Contraceptives postcoital synthetic. Medical search

Contraceptive substances to be used after COITUS. These agents include high doses of estrogenic drugs; progesterone-receptor blockers; ANTIMETABOLITES; ALKALOIDS, and PROSTAGLANDINS.

Postcoital contraceptives which owe their effectiveness to hormonal preparations.

Compounds, usually hormonal, taken orally in order to block ovulation and prevent the occurrence of pregnancy. The hormones are generally estrogen or progesterone or both.

The sexual union of a male and a female, a term used for human only.

Fixed drug combinations administered orally for contraceptive purposes.

Abnormal uterine bleeding that is not related to MENSTRUATION, usually in females without regular MENSTRUAL CYCLE. The irregular and unpredictable bleeding usually comes from a dysfunctional ENDOMETRIUM.

Chemical substances that prevent or reduce the probability of CONCEPTION.

Chemical compounds that induce menstruation either through direct action on the reproductive organs or through indirect action by relieving another condition of which amenorrhea is a secondary result. (From Dorland, 27th ed)

Oral contraceptives which owe their effectiveness to hormonal preparations.

Postcoital contraceptives which owe their effectiveness to synthetic preparations.

Chemical substances or agents with contraceptive activity in females. Use for female contraceptive agents in general or for which there is no specific heading.

Bleeding from blood vessels in the UTERUS, sometimes manifested as vaginal bleeding.

A semisynthetic alkylated ESTRADIOL with a 17-alpha-ethinyl substitution. It has high estrogenic potency when administered orally, and is often used as the estrogenic component in ORAL CONTRACEPTIVES.

Oral contraceptives which owe their effectiveness to synthetic preparations.

Devices that diminish the likelihood of or prevent conception. (From Dorland, 28th ed)

Prevention of CONCEPTION by blocking fertility temporarily, or permanently (STERILIZATION, REPRODUCTIVE). Common means of reversible contraception include NATURAL FAMILY PLANNING METHODS; CONTRACEPTIVE AGENTS; or CONTRACEPTIVE DEVICES.

Contraceptive devices used by females.

Means of postcoital intervention to avoid pregnancy, such as the administration of POSTCOITAL CONTRACEPTIVES to prevent FERTILIZATION of an egg or implantation of a fertilized egg (OVUM IMPLANTATION).

Behavior patterns of those practicing CONTRACEPTION.

Chemical substances or agents with contraceptive activity in males. Use for male contraceptive agents in general or for which there is no specific heading.

Contraceptive devices placed high in the uterine fundus.

Health care programs or services designed to assist individuals in the planning of family size. Various methods of CONTRACEPTION can be used to control the number and timing of childbirths.

A synthetic progestational hormone used often as the progestogenic component of combined oral contraceptive agents.

A synthetic progestational agent with actions similar to those of PROGESTERONE. This racemic or (+-)-form has about half the potency of the levo form (LEVONORGESTREL). Norgestrel is used as a contraceptive, ovulation inhibitor, and for the control of menstrual disorders and endometriosis.

A synthetic progestational hormone with actions similar to those of PROGESTERONE and about twice as potent as its racemic or (+-)-isomer (NORGESTREL). It is used for contraception, control of menstrual disorders, and treatment of endometriosis.

The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.

The 3-methyl ether of ETHINYL ESTRADIOL. It must be demethylated to be biologically active. It is used as the estrogen component of many combination ORAL CONTRACEPTIVES.

A synthetic progestational hormone with actions similar to those of PROGESTERONE but functioning as a more potent inhibitor of ovulation. It has weak estrogenic and androgenic properties. The hormone has been used in treating amenorrhea, functional uterine bleeding, endometriosis, and for contraception.

Vaccines or candidate vaccines used to prevent conception.

Unintended accidental pregnancy, including pregnancy resulting from failed contraceptive measures.

Procedures to block or remove all or part of the genital tract for the purpose of rendering individuals sterile, incapable of reproduction. Surgical sterilization procedures are the most commonly used. There are also sterilization procedures involving chemical or physical means.

Pregnancy, usually accidental, that is not desired by the parent or parents.

A synthetic progestin that is derived from 17-hydroxyprogesterone. It is a long-acting contraceptive that is effective both orally or by intramuscular injection and has also been used to treat breast and endometrial neoplasms.

Chemical substances that are destructive to spermatozoa used as topically administered vaginal contraceptives.

A synthetic progestational hormone with actions and uses similar to those of PROGESTERONE. It has been used in the treatment of functional uterine bleeding and endometriosis. As a contraceptive, it has usually been administered in combination with MESTRANOL.

The periodic shedding of the ENDOMETRIUM and associated menstrual bleeding in the MENSTRUAL CYCLE of humans and primates. Menstruation is due to the decline in circulating PROGESTERONE, and occurs at the late LUTEAL PHASE when LUTEOLYSIS of the CORPUS LUTEUM takes place.

Intrauterine contraceptive devices that depend on the release of metallic copper.

A synthetic progestational hormone used alone or in combination with estrogens as an oral contraceptive.

Contraceptive methods based on immunological processes and techniques, such as the use of CONTRACEPTIVE VACCINES.

Intentional removal of a fetus from the uterus by any of a number of techniques. (POPLINE, 1978)

Pregnenes with one double bond or more than three double bonds which have undergone ring contractions or are lacking carbon-18 or carbon-19..

Compounds that interact with PROGESTERONE RECEPTORS in target tissues to bring about the effects similar to those of PROGESTERONE. Primary actions of progestins, including natural and synthetic steroids, are on the UTERUS and the MAMMARY GLAND in preparation for and in maintenance of PREGNANCY.

ETHINYL ESTRADIOL and NORGESTREL given in fixed proportions. It has proved to be an effective contraceptive (CONTRACEPTIVES, ORAL, COMBINED).

A field of biological research combining engineering in the formulation, design, and building (synthesis) of novel biological structures, functions, and systems.

Drugs administered orally and sequentially for contraceptive purposes.

Procedures that render the female sterile by interrupting the flow in the FALLOPIAN TUBE. These procedures generally are surgical, and may also use chemicals or physical means.

Biologically functional sequences of DNA chemically synthesized in vitro.

Steroidal compounds related to PROGESTERONE, the major mammalian progestational hormone. Progesterone congeners include important progesterone precursors in the biosynthetic pathways, metabolites, derivatives, and synthetic steroids with progestational activities.

Unsaturated derivatives of the steroid androstane containing at least one double bond at any site in any of the rings.

The period from onset of one menstrual bleeding (MENSTRUATION) to the next in an ovulating woman or female primate. The menstrual cycle is regulated by endocrine interactions of the HYPOTHALAMUS; the PITUITARY GLAND; the ovaries; and the genital tract. The menstrual cycle is divided by OVULATION into two phases. Based on the endocrine status of the OVARY, there is a FOLLICULAR PHASE and a LUTEAL PHASE. Based on the response in the ENDOMETRIUM, the menstrual cycle is divided into a proliferative and a secretory phase.

The number of offspring a female has borne. It is contrasted with GRAVIDITY, which refers to the number of pregnancies, regardless of outcome.

Intrauterine devices that release contraceptive agents.

Knowledge, attitudes, and associated behaviors which pertain to health-related topics such as PATHOLOGIC PROCESSES or diseases, their prevention, and treatment. This term refers to non-health workers and health workers (HEALTH PERSONNEL).

Contraceptive devices used by males.

17-Hydroxy-6-methylpregna-3,6-diene-3,20-dione. A progestational hormone used most commonly as the acetate ester. As the acetate, it is more potent than progesterone both as a progestagen and as an ovulation inhibitor. It has also been used in the palliative treatment of breast cancer.

Pregnancy in human adolescent females under the age of 19.

Variations of menstruation which may be indicative of disease.

Small containers or pellets of a solid drug implanted in the body to achieve sustained release of the drug.

Education which increases the knowledge of the functional, structural, and behavioral aspects of human reproduction.

(6 alpha)-17-Hydroxy-6-methylpregn-4-ene-3,20-dione. A synthetic progestational hormone used in veterinary practice as an estrus regulator.

Steroidal compounds related to ESTRADIOL, the major mammalian female sex hormone. Estradiol congeners include important estradiol precursors in the biosynthetic pathways, metabolites, derivatives, and synthetic steroids with estrogenic activities.

Chemical substances which inhibit the process of spermatozoa formation at either the first stage, in which spermatogonia develop into spermatocytes and then into spermatids, or the second stage, in which spermatids transform into spermatozoa.

Blocking the process leading to OVULATION. Various factors are known to inhibit ovulation, such as neuroendocrine, psychological, and pharmacological agents.

Pregnadienes which have undergone ring contractions or are lacking carbon-18 or carbon-19.

The capacity to conceive or to induce conception. It may refer to either the male or female.

A sheath that is worn over the penis during sexual behavior in order to prevent pregnancy or spread of sexually transmitted disease.

Sexual activities of humans.

A medicated adhesive patch placed on the skin to deliver a specific dose of medication into the bloodstream.

17 alpha-Hydroxypregn-4-en-20-yn-3-one. A synthetic steroid hormone with progestational effects.

Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.

Compounds that interact with ESTROGEN RECEPTORS in target tissues to bring about the effects similar to those of ESTRADIOL. Estrogens stimulate the female reproductive organs, and the development of secondary female SEX CHARACTERISTICS. Estrogenic chemicals include natural, synthetic, steroidal, or non-steroidal compounds.

The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION.

An aspect of personal behavior or lifestyle, environmental exposure, or inborn or inherited characteristic, which, on the basis of epidemiologic evidence, is known to be associated with a health-related condition considered important to prevent.

Elements of limited time intervals, contributing to particular results or situations.

Nonionic surfactant mixtures varying in the number of repeating ethoxy (oxy-1,2-ethanediyl) groups. They are used as detergents, emulsifiers, wetting agents, defoaming agents, etc. Nonoxynol-9, the compound with 9 repeating ethoxy groups, is a spermatocide, formulated primarily as a component of vaginal foams and creams.

Individuals requesting induced abortions.

Members of the class of compounds composed of AMINO ACIDS joined together by peptide bonds between adjacent amino acids into linear, branched or cyclical structures. OLIGOPEPTIDES are composed of approximately 2-12 amino acids. Polypeptides are composed of approximately 13 or more amino acids. PROTEINS are linear polypeptides that are normally synthesized on RIBOSOMES.

Age as a constituent element or influence contributing to the production of a result. It may be applicable to the cause or the effect of a circumstance. It is used with human or animal concepts but should be differentiated from AGING, a physiological process, and TIME FACTORS which refers only to the passage of time.

Termination of pregnancy under conditions allowed under local laws. (POPLINE Thesaurus, 1991)

Health care services related to human REPRODUCTION and diseases of the reproductive system. Services are provided to both sexes and usually by physicians in the medical or the surgical specialties such as REPRODUCTIVE MEDICINE; ANDROLOGY; GYNECOLOGY; OBSTETRICS; and PERINATOLOGY.

Studies which start with the identification of persons with a disease of interest and a control (comparison, referent) group without the disease. The relationship of an attribute to the disease is examined by comparing diseased and non-diseased persons with regard to the frequency or levels of the attribute in each group.

The social institution involving legal and/or religious sanction whereby individuals are joined together.

Predetermined sets of questions used to collect data - clinical data, social status, occupational group, etc. The term is often applied to a self-completed survey instrument.

The concept covering the physical and mental conditions of women.

An important aggregate factor in epidemiological studies of women's health. The concept usually includes the number and timing of pregnancies and their outcomes, the incidence of breast feeding, and may include age of menarche and menopause, regularity of menstruation, fertility, gynecological or obstetric problems, or contraceptive usage.

Statistical models which describe the relationship between a qualitative dependent variable (that is, one which can take only certain discrete values, such as the presence or absence of a disease) and an independent variable. A common application is in epidemiology for estimating an individual's risk (probability of a disease) as a function of a given risk factor.

Diseases due to or propagated by sexual contact.

A contraceptive method whereby coitus is purposely interrupted in order to prevent EJACULATION of SEMEN into the VAGINA.

Absence of menstruation.

An orally active synthetic progestational hormone used often in combinations as an oral contraceptive.

The number of births in a given population per year or other unit of time.

Human males as cultural, psychological, sociological, political, and economic entities.

In females, the period that is shortly after giving birth (PARTURITION).

Antimutagenic effects of centchroman--a contraceptive and a candidate drug for breast cancer in multiple mutational assays. (1/25)

Centchroman (CC), a non-steroidal oral contraceptive and a candidate drug for breast cancer, has been reported to exhibit partial to complete remission of lesions in 40.5% of breast cancer patients. The potent anti-oestrogenic activity, negligible side-effects and anti-breast cancer activity of CC prompted us to evaluate the antimutagenic effects of this compound in a bacterial mutagenicity assay and CHO/HPRT and AS52/GPT mutation assays in vitro and in vivo in female Swiss albino mice as measured by both sister chromatid exchange (SCE) and chromosome aberrations (CA) against three known positive mutagen compounds, dimethylbenz[a]anthracene (DMBA), cyclophosphamide (CP) and mitomycin C (MMC). Antimutagenicity assays in Salmonella strains TA97a, TA100, TA98 and TA102 were carried out against commonly used known positive mutagens, sodium azide, 4-nitro-o-phenylenediamine, cumine hydroperoxide, 2-aminofluorene and danthron. A significantly reduced number of bacterial histidine revertant colonies was observed in the plates treated with 0.1, 1, 5 and 10 microg/plate CC and a positive compound when compared with bacterial plates treated with the respective positive compound alone. Ethyl methanesulfonate (EMS), a commonly used positive mutagen for CHO/HPRT and AS52/GPT gene mutation assays, was used for antimutagenicity assay in these cells. CC exhibited protective effects against the mutagenicity of EMS in these two mammalian cell mutation assays, CHO/HPRT and AS52/GPT. In the in vivo studies, pretreatment with CC reduced DMBA-induced SCE and CA and CP- and MMC-induced CA when compared with the group treated only with the positive compounds. These results indicate that CC can reduce the mutagenic effects of known genotoxic compounds. (+info)

CDB-2914: anti-progestational/anti-glucocorticoid profile and post-coital anti-fertility activity in rats and rabbits. (2/25)

Our goal was to determine the endocrine and post-coital anti-fertility activity of CDB-2914. Concurrent administration of progesterone to rats on day 4 post-mating blocked the anti-fertility activity of a single oral 2 mg dose of CDB-2914. CDB-2914 did not exhibit progestational activity in the oestradiol-primed immature female rabbit at doses that exhibited anti-progestational activity. CDB-2914 antagonized exogenous and endogenous progesterone-stimulated uterine haptoglobin synthesis and secretion in immature and adult mated rabbits respectively. Neither CDB-2914 nor mifepristone exhibited glucocorticoid activity as determined by thymus involution in rats; mifepristone was twice as potent as CDB-2914 in antagonizing glucocorticoid action. Post-coital CDB-2914 treatment resulted in a dose-dependent reduction in implantation sites and pregnancy rates in rabbits. CDB-2914-induced inhibition of uterine weight increase, endometrial glandular arborization and uterine haptoglobin synthesis/secretion correlated with inhibition of pregnancy in mated rabbits. A single oral dose of 64 mg CDB-2914/rabbit was effective at blocking pregnancy when administered on day 4, 5, or 6 post-mating, whereas 32 mg/rabbit was only partially effective in this regard. These data demonstrate that CDB-2914 is a potent, orally active anti-progestin with weak anti-glucocorticoid activity. CDB-2914 inhibited implantation in adult rats and rabbits demonstrating its potential as a post-coital contraceptive drug. (+info)

A single mid-follicular dose of CDB-2914, a new antiprogestin, inhibits folliculogenesis and endometrial differentiation in normally cycling women. (3/25)

Previous studies in women have shown that the antiprogestin mifepristone delays or inhibits folliculogenesis. The purpose of this study was to explore whether a new analogue, CDB-2914, has similar effects on folliculogenesis, ovulation, or on subsequent luteal phase endometrial maturation. Forty-four normally cycling, healthy women recorded urine LH and vaginal bleeding during pre-treatment, treatment, and post-treatment cycles. At a lead follicle diameter of 14-16 mm, a single oral dose (10, 50, 100 mg) of CDB-2914 or placebo was given, and daily ultrasound, oestradiol and progesterone were obtained until follicular collapse; an endometrial biopsy was obtained 5-7 days later. Single doses of CDB-2914 were well tolerated. Mid-follicular CDB-2914 suppressed lead follicle growth, causing a dose-dependent delay in folliculogenesis and suppression of plasma oestradiol. At higher doses, a new lead follicle was often recruited. Although luteinized unruptured follicles were observed at the 100 mg dose, all women had follicular collapse. There was a significant delay in endometrial maturation after CDB-2914 at all doses. The treatment cycle was lengthened by 1-2 weeks in 30% at 100, 27% at 50 and 9% at 10 mg. CDB-2914 altered ovarian and endometrial physiology without major effects on menstrual cyclicity and may have therapeutic utility. (+info)

Circulating concentrations of the antiprogestins CDB-2914 and mifepristone in the female rhesus monkey following various routes of administration. (4/25)

The overall aim of these studies was to investigate the oral and i.m. bioavailability of CDB-2914 in intact female rhesus monkeys, and to compare the serum concentrations of CDB-2914 with that of mifepristone following oral administration. In the first study, a 50 mg bolus of CDB-2914 per monkey was administered intravenously, orally or intramuscularly. The area under the serum concentration-time curve for 72 h (AUC(0-72)) following i.v. injection was 18 320 +/- 2718 ng/ml*h, and that for oral administration was 10 464 +/- 3248 ng/ml*h. Thus, the oral bioavailability of CDB-2914 equivalents was 56%. The AUC(0-168 h) following i.m. injection was 11 226 +/- 1130 ng/ml*h. Therefore, the i.m. bioavailability of CDB-2914 equivalents was 62%. In the second study, the serum concentrations of CDB-2914 and mifepristone equivalents were compared following an oral bolus dose in two different formulations. When administered at 5 mg/kg in aqueous suspending vehicle (ASV), the mean peak serum concentration (C(max)) of CDB-2914 equivalents (192 +/- 64 ng/ml) occurred at 5 +/- 1 h, whereas the C(max) of mifepristone equivalents (82 +/- 25 ng/ml) occurred at 3 +/- 1 h. Following administration in gelatin capsules (35 mg/monkey), the C(max) of CDB-2914 equivalents (129 +/- 24 ng/ml) occurred at 5 +/- 1 h, while the C(max) of mifepristone equivalents (31 +/- 8 ng/ml) occurred at 3 +/- 1 h. The serum concentration (AUC(0-120 h)) of CDB-2914 equivalents was 4.7- or 5. 3-fold greater than that of mifepristone equivalents when administered orally in ASV or gelatin capsules respectively. The serum protein binding characteristics of CDB-2914 were also studied. CDB-2914 bound to human alpha(1)-acid glycoprotein (AAG), but not with as high an affinity as mifepristone. In contrast, neither CDB-2914 nor mifepristone bound with high affinity to AAG, corticosteroid binding globulin or sex hormone binding globulin in monkey serum. Collectively, these results indicated that CDB-2914 was more efficiently absorbed than mifepristone following oral administration to female rhesus monkeys. (+info)

Emergency postcoital contraception. (5/25)

Emergency postcoital contraception, a method used to prevent pregnancy after unprotected sexual intercourse, is a highly effective but underutilized birth control option. Two hormone regimens, ethinyl estradiol (100 microg) with levonorgestrel (0.5 mg) or high-dose levonorgestrel (0.75 mg), given within 72 hours of intercourse and repeated 12 hours later, are available for this purpose. These regimens are packaged as Food and Drug Administration labeled, dedicated products or can be adapted for use from standard oral contraceptive pills. Emergency postcoital contraception should be considered as a primary prevention health service to women of childbearing age. (+info)

Pharmacokinetic study of different dosing regimens of levonorgestrel for emergency contraception in healthy women. (6/25)

BACKGROUND: Levonorgestrel (LNG) is a commonly used progestin for emergency contraception; however, little is known about its pharmacokinetics and optimal dose for use. METHODS: Serum levels of LNG and sex hormone-binding globulin (SHBG) were measured in five women who received three different regimens: A: 0.75 mg LNG twice with a 12 h interval; B: 0.75 mg twice with a 24 h interval; and C: 1.50 mg in a single dose, with a washout period of 28 days between each treatment. Blood samples were taken before pill intake and at 1, 2, 4, 8 and 12 h after each dose, every 12 h up to day 4 and every 24 h until day 10. LNG and SHBG were measured in all samples. RESULTS: Maximum LNG concentrations were of approximately 27 nmol/l for treatments A and B, and close to 40 nmol/l for treatment C. The area under the curve was significantly higher for treatment C during the first 12 h, and significantly lower for treatment B during the first 24 h. After 48 h and up to 9 days from onset of treatment, serum LNG levels were similar in all three regimens. SHBG levels remained stable for 24 h, decreasing to 60% of the initial value from day 5 until day 10, with no difference between regimens. CONCLUSIONS: The similarity of LNG serum levels obtained with one single dose of 1.5 mg or two doses of 0.75 mg with a 12 h interval justify a clinical comparison of these two regimes. (+info)

Post-coital administration of levonorgestrel does not interfere with post-fertilization events in the new-world monkey Cebus apella. (7/25)

BACKGROUND: Experimental evidence to disprove the belief that emergency contraception with levonorgestrel (LNG) prevents pregnancy by interfering with post-fertilization events is lacking. Here we determined the effect of post-coital and pre-ovulatory administration of LNG on fertility and ovulation, respectively, in the Cebus monkey. METHODS: To determine the effect on fertility, LNG 0.75 mg or vehicle were administered orally or s.c. once or twice within the first 24 h after mating occurring very close to the time of ovulation. Females that became pregnant were aborted with mifepristone and re-entered the study after a resting cycle until each of 12 females had contributed, in a randomized order, two LNG and two vehicle-treated cycles. To determine the effect on ovulation, LNG 0.75 mg or vehicle were injected twice coinciding with follicles smaller or larger than 5 mm in diameter. Six females contributed five treated cycles each. RESULTS: The pregnancy rate was identical in vehicle- and LNG-treated cycles. LNG inhibited or delayed ovulation only when treatment coincided with a follicle <5 mm diameter. CONCLUSION: In Cebus monkeys, LNG can inhibit or delay ovulation but, once fertilization has taken place, it cannot prevent the establishment of pregnancy. These findings do not support the hypothesis that emergency contraception with LNG prevents pregnancy by interfering with post-fertilization events. (+info)

Mechanisms of action of mifepristone and levonorgestrel when used for emergency contraception. (8/25)

An emergency contraceptive method is used after coitus but before pregnancy occurs. The use of emergency contraception is largely under-utilized worldwide. One of the main barriers to widespread use is concern about the mechanism of action. Recently, treatment with either 10 mg mifepristone or 1.5 mg of levonorgestrel has emerged as the most effective hormonal method for emergency contraception with very low side-effects. However, the knowledge of the mechanism of action of mifepristone and levonorgestrel in humans, when used for contraceptive purposes and especially for emergency contraception, remains incomplete. The objective of this review is to summarize available data on the effects of mifepristone and levonorgestrel on female reproductive functions relevant to the emergency use of the compounds. When summarized, available data from studies in humans indicate that the contraceptive effects of both levonorgestrel and mifepristone, when used in single low doses for emergency contraception, involve either blockade or delay of ovulation, due to either prevention or delay of the LH surge, rather than to inhibition of implantation. (+info)

... contraceptives, postcoital, hormonal MeSH D27.505.696.875.360.276.310.360 - contraceptives, postcoital, synthetic MeSH D27.505. ... contraceptives, postcoital, hormonal MeSH D27.505.954.705.360.276.310.360 - contraceptives, postcoital, synthetic MeSH D27.505. ... contraceptives, oral, synthetic MeSH D27.505.696.875.360.276.310 - contraceptives, postcoital MeSH D27.505.696.875.360.276. ... contraceptives, oral, synthetic MeSH D27.505.954.705.360.276.310 - contraceptives, postcoital MeSH D27.505.954.705.360.276. ...

https://en.wikipedia.org/wiki/List_of_MeSH_codes_(D27)

In May 1973, in an attempt to restrict off-label use of DES as a postcoital contraceptive to emergency situations such as rape ... p. 7. Ulipristal acetate is an orally-active synthetic selective progesterone receptor modulator which acts via high-affinity ... In February 1975, the FDA said it had not yet approved DES as a postcoital contraceptive, but would after March 8, 1975 permit ... To discourage off-label use of DES as a postcoital contraceptive, in February 1975 the FDA ordered DES 25 mg (and higher) ...

https://en.wikipedia.org/wiki/Emergency_contraception

As an emergency postcoital contraceptive. *As a means of chemical castration for hypersexuality and paraphilias in men and sex ... Synthetic. Steroidal. ?. 2 mg. ?. ?. ?. ? Diethylstilbestrol. Synthetic. Nonsteroidal. 2.5 mg. 20-30 mg. 11 mg. 0.5-2.0 mg. ,5 ... In 1973, in an attempt to restrict off-label use of DES as a postcoital contraceptive (which had become prevalent at many ... regimen of certain regular combined oral contraceptive pills superseded off-label use of DES as a postcoital contraceptive.[111 ...

https://en.m.wikipedia.org/wiki/Diethylstilbestrol

F. Lakha, P.C. Ho and Z.M. Van der Spuy et al., A novel estrogen-free oral contraceptive pill for women: multicentre, double- ... a b Adrenocorticotropic Hormone; Adrenocortical Steroids and Their Synthetic Analogs; Inhibitors of the Synthesis and Actions ... Emergency Postcoital Contraception. „American Family Physician", 2000-11-15. American Academy of Family Physicians. [dostęp ...

https://pl.wikipedia.org/wiki/Mifepriston

Rubio B, Berman E, Larranaga A, Guiloff E (1970). "A new postcoital oral contraceptive". Contraception. 1 (5): 303-314. doi: ... is a synthetic estrane steroid and a derivative of testosterone. It is the C13β or levorotatory stereoisomer and enantiopure ... These formulations are used as emergency contraceptives, normal contraceptives, or in menopausal hormone therapy for the ... Levonorgestrel is currently the most androgenic progestin that remains used in contraceptives, and contraceptives containing ...

https://en.wikipedia.org/wiki/Levonorgestrel

In this case synthetic FSH by injection or Clomid (Clomiphene citrate) via a pill can be given to stimulate follicles to mature ... a woman under 35 has not conceived after 12 months of contraceptive-free intercourse. Twelve months is the lower reference ... a woman over 35 has not conceived after 6 months of contraceptive-free sexual intercourse. ... during which they have not used any contraceptives.[13] The World Health Organisation also adds that 'women whose pregnancy ...

https://en.wikipedia.org/wiki/Infertility

Contraceptive Agents, Female. Contraceptive Agents. Contraceptives, Postcoital, Synthetic. Contraceptives, Postcoital. Hormone ... women and men of reproductive potential may not participate unless they have agreed to use an effective local contraceptive ... Contraceptives, Oral, Synthetic. Contraceptives, Oral. ...

https://clinicaltrials.gov/ct2/show/NCT03015701

Contraceptive Agents, Female. Contraceptive Agents. Contraceptives, Postcoital, Synthetic. Contraceptives, Postcoital. Hormone ... Contraceptives, Oral, Synthetic. Contraceptives, Oral. ...

https://clinicaltrials.gov/ct2/show/NCT02179749?term=Mifepristone+Treatment+of+alcohol+Use+Disorder&

https://www.clinicaltrials.gov/ct2/show/NCT00637494

Contraceptive Agents, Female. Contraceptive Agents. Contraceptives, Oral, Synthetic. Contraceptives, Postcoital, Synthetic. ... The objective of this study was to investigate the impact of the oral contraceptive YASMIN (containing: drospirenone 3 mg/ ... Single Center, Double Blind, Randomized, Crossover Study to Investigate the Impact of the Oral Contraceptive Yasmin (30 µg EE ... Standard contraindications for use of combined oral contraceptives (class label). Including:. *Presence or history of ...

https://www.clinicaltrials.gov/ct2/show/NCT00651846?term=DROSPIRENONE+AND+ETHINYL+ESTRADIOL&rank=73

Contraceptives, Oral, Synthetic. * Contraceptives, Postcoital, Synthetic. * Hormone Antagonists. * Abortifacient Agents, ... Mifepristone is a synthetic steroid with antiprogestational effects indicated for the medical termination of intrauterine ...

http://pharmacycode.com/Mifepristonum_%5BLatin%5D.html

Contraceptives, Postcoital, Synthetic (3) • Postcoital contraceptives which owe their effectiveness to synthetic preparations. ... Contraceptives, Oral, Synthetic (28) • Oral contraceptives which owe their effectiveness to synthetic preparations. MeSH ... Contraceptives, Postcoital, Hormonal (1) • Postcoital contraceptives which owe their effectiveness to hormonal preparations. ... Contraceptives, Postcoital (8) • Contraceptive substances to be used after COITUS. These agents include high doses of ...

https://druginfo.nlm.nih.gov/drugportal/drug/categories/c

https://en.wikipedia.org/wiki/List_of_MeSH_codes_(D27)

... but was originally screened in a drug development program oriented toward discovering new post-coital contraceptive agents. ... It is a synthetic derivative of triphenylethylene but was originally screened in a drug development program oriented toward ... discovering new post-coital contraceptive agents.. In its testing, tamoxifen had proved effective in rats but not in women. It ... It is a synthetic derivative of triphenylethylene ...

https://www.news-medical.net/health/Tamoxifen-Mechanism.aspx

Effectiveness of emergency postcoital contraception may be diminished.. Menopausal Hormone Replacement Therapy. EFV, ETR, NVP. ... Hormonal Contraceptives. EFV. Ethinyl estradiol ↔ Levonorgestrel (metabolite of oral norgestimate) AUC ↓ 83% Norelgestromin ( ... With estradiol or conjugated estrogen (equine and synthetic): ↓ estrogen possible ↓ medroxyprogesterone possible ↓ micronized ... See Hormonal Contraceptives for other progestin-NNRTI interactions Monitor menopausal symptoms. The lowest dose of hormonal ...

https://aidsinfo.nih.gov/guidelines/html/1/adult-and-adolescent-arv-guidelines/285/nnrti-drug-interactions

The oral postcoital emergency contraceptive products (e.g., Plan B and others) are not to be used by females who suspect or ... Synthetic progestin with high progestational and androgenic activity. Used for routine contraception and/or menorrhagia as an ... Hormonal contraceptives include combination oral contraceptives, non-oral combination contraceptives, and contraceptives ... Hormonal contraceptives include combination oral contraceptives, non-oral combination contraceptives, and contraceptives ...

https://www.pdr.net/drug-summary/plan-b-one-step?druglabelid=573

Contraceptives, Postcoital, Synthetic. *Norpregnadienes. *Receptors, Progesterone. *ulipristal acetate. Grant support. *R24 ...

https://www.ncbi.nlm.nih.gov/pubmed/22770793?dopt=Abstract

Chemical contraceptives, both long-term and emergency, use a synthetic version of the hormone progestin. Progestin has effects ... Ella boasts of 120 hours (5 days) of post-coital effectiveness. The drug is produced by the Paris-based pharmaceutical company ... 1] Levonogestrel is also the active ingredient in the Intra-uterine contraceptive Mirena and the contraceptive implants ... But Ella (generic name ulipristal acetate) is not a synthetic progestin that mimics the action of progesterone. The FDA press ...

https://www.culture-of-life.org/2010/08/26/unmasking-the-ella-masquerade-blurring-the-line-between-contraception-and-abortion/

https://en.wikipedia.org/wiki/Emergency_contraception

Emergency contraceptive pills (ECPs), also known as "postcoital contraception" or the "morning-after pill," work by changing a ... They give the body a short, high burst of synthetic hormones that disrupt natural hormone production needed for ovulation and ... Some people call emergency contraceptive pills "morning-after pills." But you do not have to wait until the morning after. You ... The FDA currently approves three different types of emergency contraceptive pills: pills that contain only progestin, pills ...

https://www.ourbodiesourselves.org/book-excerpts/health-article/types-of-emergency-contraception-pills/

... dedicated products or can be adapted for use from standard oral contraceptive pills. Emergency postcoital contraception should ... Emergency postcoital contraception, a method used to prevent pregnancy after unprotected sexual intercourse, is a highly ... the antiprogestin synthetic steroid RU 486 (mifepristone; Mifeprex), estrogen alone (high-dose ethinyl estradiol) and the ... 7. Vasilakis C, Jick SS, Jick H. The risk of venous thromboembolism in users of postcoital contraceptive pills. Contraception. ...

https://www.aafp.org/afp/2000/1115/p2287.html

Dixon GW, Schlesselman JJ, Ory HW et al: Ethinyl estradiol and conjugated estrogens as postcoital contraceptives. ... These corticosteroids are synthetic and much more potent than steroids naturally occurring in the body and typically last much ...

https://flightcaster.com/cheap-anabolic-supplements.html

The pill is also known as the "Morning After" pill or as post-coital contraception, the emergency pill works within three days ... Emergency Contraceptives reduce the likelihood of becoming pregnant but do not protect against sexually transmitted diseases. ... bursts of synthetic that disrupts hormone patterns needed for pregnancy. EC is used within 120 hours after the intercourse and ... pregnancy can be prevented even after the intercourse by taking the Emergency Contraceptives pills (EC). These pills give the ...

http://ndri.com/news/lifestyles_condoms-189.html

Animals, Contraceptives, Postcoital, pharmacology, Contraceptives, Postcoital, Synthetic, administration & dosage, Eflornithine ... The effect of cotrimoxazole on oral contraceptive steroids in women. 1983 Grimmer S.F.M et al. Contraception cited 9 times ... Urinary concentrations of steroid glucuronides in women taking oral contraceptives. 1983 Shaw M.A et al. Contraception cited 1 ... Ten Egyptian women who were using the injectable contraceptive norethisterone oenanthate (NET-OEN) for at least 6 months were ...

https://academic.naver.com/search.naver?field=3&query=Contraception+28%EA%B6%8C+1%ED%98%B8

Plan B: Emergency Contraceptive Pill. Plan B is a progestin-only emergency contraceptive pill (ECP) that can be taken within ... Post-Coital Oral Emergency Contraception. Post-coital oral emergency contraception is used for the prevention of pregnancy ... Progestin: Synthetic Progesterone. Progestin is a synthetic form of progesterone, a naturally occurring hormone, which plays an ... The first contraceptive pill, called Enovid, had been on the market since June 1960, and Rock was one of the leading ...

https://embryo.asu.edu/search?text=oral%20contraceptive%20pill

https://en.m.wikipedia.org/wiki/Diethylstilbestrol

contraceptives (postcoital synthetic). *ethinyl estradiol. *levonorgestrel. *mifepristone. Ashok PW, Stalder C, Wagaarachchi PT ... mifepristone given in a 100 mg dose was a more effective post-coital contraceptive than the Yuzpe regimen. ... Mifepristone (RU 486) compared with high-dose estrogen and progestogen for emergency postcoital contraception. N Eng J Med 1992 ... Webb AM, Russell J, Elstein M. Comparison of Yuzpe regimen, danazol, and mifepristone (RU486) in oral postcoital contraception ...

http://ebn.bmj.com/content/6/1/14.full?related-urls=yes&legid=ebnurs

Post-coital contraception is started with coronary angiography, thereby inhibiting cD4/CCR5-positive are used to prazosin, ... Concomitant use is normal physiological conducting ventricular rate is converted to a synthetic prosta- cyclin, like reaction. ... 5 549 leukotriene receptor antagonist selective oestrogen contraceptive pill Retinol is retained. The newer progestogens, as ... 5 549 leukotriene receptor antagonist selective oestrogen contraceptive pill. Amphotericin is itself is constantly changing ...

http://imagenenaccion.org/how-long-for-lamictal-side-effects-to-go-away

Contraceptives, Oral, Synthetic. *Contraceptives, Postcoital. *Cytochrome P-450 CYP2C8 Inhibitors. *Cytochrome P-450 CYP2C8 ... Mifepristone is a synthetic steroid with antiprogestational effects indicated for the medical termination of intrauterine ... activity and progestin and glucocorticoid receptor binding of the putative metabolites and synthetic derivatives of CDB-2914, ...

https://www.drugbank.ca/drugs/DB00834

Info Contraceptives, Oral, Synthetic. * Info Contraceptives, Postcoital. * Info Contraceptives, Postcoital, Synthetic. * Info ...

https://druginfo.nlm.nih.gov/drugportal/name/Mifepristone

In February 1975, the FDA said it had not yet approved DES as a postcoital contraceptive, but would after March 8, 1975 permit ... contraceptive) use of diethylstilbestrol (DES), a synthetic estrogen. ... In May 1973, in an attempt to restrict off-label use of DES as a postcoital contraceptive to emergency situations such as rape ... To discourage off-label use of DES as a postcoital contraceptive, in February 1975 the FDA ordered DES 25 mg (and higher) ...

https://diethylstilbestrol.co.uk/tag/des-1st-generation/

No need to rule out pregnancy with postcoital contraceptive regimens.126 127 128 136 Postcoital contraceptive regimens (i.e., ... Contraceptives containing synthetic progestinic steroids.106 117 119 120 125 a. Uses for Progestins (Etonogestrel, ... Postcoital (emergency) contraception: Irregular vaginal bleeding also possible with postcoital contraceptive regimens;106 126 ... Progestin contraceptives administered after intercourse (postcoital) produce contraceptive effects by inhibiting or delaying ...

https://www.drugs.com/monograph/progestins-etonogestrel-levonorgestrel-norethindrone.html

... and as a post-coital emergency contraceptive ("morning-after pill").[3] It was first thought to be safe and effective, but ... 1][2] DES is a synthetic form of the female hormone. estrogen. that was prescribed to pregnant women between about 1940 and ...

https://phgkb.cdc.gov/PHGKB/phgHome.action?action=forward&dbsource=cluster&id=24557

... a semi-synthetic derivative of camptothecin, is an effective postcoital contraceptive and do not rush. General somatic ...

https://meownowfl.org/donations/chemical-name-of-viagra-1197/56/

... nonsteroidal estrogen that was developed as a postcoital contraceptive in the 1960s but was never marketed.[1][2][3][4] ... Synthetic xenoestrogens (e.g., alkylphenols, bisphenols (e.g., BPA, BPF, BPS), DDT, parabens, PBBs, PHBA, phthalates, PCBs) ... Revaz C, Goldenberg B, Achtari H (1971). "[Critical study of new contraceptive methods]". Schweiz Med Wochenschr (in French). ... Fenestrel (INN, USAN) (developmental code name ORF-3858) is a synthetic, ...

http://www.let.rug.nl/~gosse/termpedia2/termpedia.php?language=dutch_general&density=7&link_color=000000&termpedia_system=perl_db&url=http%3A%2F%2Fen.wikipedia.org%2Fwiki%2FFenestrel

Hormonal birth control methods use a higher concentration of synthetic progesterone and a lower concentration of synthetic ... The oral contraceptive, "the pill," was the first available method of delivery, and it is still widely used. Several types are ... Some combination birth control pills may be used in higher dosages as morning after pills (MAPs), for postcoital emergency ... Contraceptive methods are designed to prevent sperm from reaching and penetrating a secondary oocyte, which leads to the ...

https://www.earthslab.com/physiology/various-methods-birth-control-work/

For use as postcoital contraception within 72 hours of unprotected intercourse or known or suspected contraceptive failure - for use in females who have no known contraindications to use, have achieved menarche, and are not known or suspected to be pregnant. (pdr.net)
Intrauterine devices (IUDs)-usually used as a primary contraceptive method-are sometimes used as the most effective form of emergency contraception. (wikipedia.org)
Emergency contraception are birth control measures taken to reduce the risk of pregnancy following unprotected sexual intercourse or when other regular contraceptive measures have not worked properly or not been used correctly. (wikipedia.org)
Emergency contraceptive pills (ECPs) (sometimes referred to as emergency hormonal contraception, EHC) are taken after unprotected sexual intercourse or breakage of a condom. (wikipedia.org)
Emergency contraceptive pills (ECPs), also known as "postcoital contraception" or the "morning-after pill," work by changing a woman's hormone levels in the same ways birth control pills and other hormonal methods work. (ourbodiesourselves.org)
Emergency postcoital contraception, a method used to prevent pregnancy after unprotected sexual intercourse, is a highly effective but underutilized birth control option. (aafp.org)
Emergency postcoital contraception should be considered as a primary prevention health service to women of childbearing age. (aafp.org)
Adapted with permission from Glasier A. Emergency postcoital contraception. (aafp.org)
The birth control pill, more commonly known as "the pill" is a form of contraception taken daily in pill form and consisting of synthetic hormones formulated to prevent ovulation, fertilization, and implantation of a fertilized egg. (asu.edu)
In women seeking emergency contraception within 72 hours after an episode of unprotected sexual intercourse, mifepristone given in a 100 mg dose was a more effective post-coital contraceptive than the Yuzpe regimen. (bmj.com)
Some combination birth control pills may be used in higher dosages as morning after pills (MAPs), for postcoital emergency contraception. (earthslab.com)
D. Rabone, "Postcoital Contraception. (rolandjb.tk)
Progestin-only emergency contraception offers a regimen that is more effective than combination oral contraceptive pills, with fewer reported side effects. (aafp.org)
Lutera is indicated for the prevention of pregnancy in women who elect to use oral contraceptives as a method of contraception. (rxlist.com)
Table II lists the typical accidental pregnancy rates for users of combination oral contraceptives and other methods of contraception. (rxlist.com)
Emergency Contraceptive Pills: The FDA has concluded that certain combined oral contraceptives containing ethinyl estradiol and norgestrel or levonorgestrel are safe and effective for use as postcoital emergency contraception. (rxlist.com)
Buy Postpone-72 1.5mg (Levonorgestrel 1.5mg) , Levonorgestrel, is an emergency hormonal contraceptive used to help prevent a pregnancy when taken within 72 hours (3 days) of having had unprotected sex or if usual method of contraception has failed. (onlinegenericmedicine.com)
See A.L. Muller and others, "Postcoital Treatment with Levonorgestrel Does Not Disrupt Postfertilization Events in the Rat," Contraception, vol. 67 (2003): 415-419. (lifeethics.org)
Emergency contraception poses the juridical question of whether a post-intercourse contraceptive constitutes as an abortifacient in Islam. (fiqhacademy.com)
In order to answer, one must first define pregnancy and understand the mechanisms of action for natural and artificial contraception, especially the three common emergency contraceptives: levonorgestrel (LNG), ulipristal acetate (UPA), and copper intrauterine devices (IUD). (fiqhacademy.com)
ABSTRACT: Contraception is widely used in the United States, and nurses in all settings may encounter patients who are using or want to use contraceptives. (nursingcenter.com)
5, 7 Understanding contraception and contraceptive care in the context of both nursing ethics and reproductive justice will help nurses be best prepared for providing optimal care. (nursingcenter.com)

A variety of types of emergency contraceptive pills are available: combined estrogen and progestin pills, progestin-only (levonorgestrel, LNG) pills, and antiprogestin (ulipristal acetate or mifepristone) pills. (wikipedia.org)
Progestin-only emergency contraceptive pills contain levonorgestrel, either as a single tablet (or historically, as a split dose of two tablets taken 12 hours apart), effective up to 72 hours after intercourse. (wikipedia.org)
Combined estrogen (ethinylestradiol) and progestin (levonorgestrel or norgestrel) pills used to be available as dedicated emergency contraceptive pills under several brand names: Schering PC4, Tetragynon, Neoprimavlar, and Preven (in the United States) but were withdrawn after more effective dedicated progestin-only (levonorgestrel) emergency contraceptive pills with fewer side effects became available. (wikipedia.org)
If other more effective dedicated emergency contraceptive pills (levonorgestrel, ulipristal acetate, or mifepristone) are not available, specific combinations of regular combined oral contraceptive pills can be taken in split doses 12 hours apart (the Yuzpe regimen), effective up to 72 hours after intercourse. (wikipedia.org)
As of 2014, there are 26 brands of regular combined oral contraceptive pills containing levonorgestrel or norgestrel available in the United States that can be used in the emergency contraceptive Yuzpe regimen, when none of the more effective and better tolerated options are available. (wikipedia.org)
1] The FDA refers to Ella as an emergency contraceptive, even comparing it in its literature to levonorgestrel. (culture-of-life.org)
Progestins make the lining of the uterus less hospitable to implantation of the increase the risk of east cancer (if given before menopause) and decrease Drug to know: levonorgestrel (Mirena IUD Plan B emergency contraceptive). (villa-agata.eu)
This paper is aimed to present a brief history of the development of one of the most important LARCs today, the levonorgestrel intrauterine system releasing levonorgestrel 20 µg per day (LNGIUS), known as Mirena® as well as the results of major studies published in recent decades with regard to the acceptability and tolerance and safety aspects related to the use of this contraceptive method. (bvsalud.org)
Objetivo: Determinar el índice de éxito y los factores asociados en el uso del dispositivo intrauterino liberador de levonorgestrel (DIU-LVN). (bvsalud.org)
Contraceptive, Data mining , Levonorgestrel. (who.int)
A single preovulatory 10 mg dose of mifepristone delays ovulation by 3 to 4 days and is as effective an emergency contraceptive as a single 1.5 mg dose of the progestin levonorgestrel. (bionity.com)
Each active, white tablet (21) contains 0.1 mg of levonorgestrel, d (-)-13β-ethyl-17α-ethinyl-17β- hydroxygon-4-en-3-one, a totally synthetic progestogen, and 0.02 mg of ethinyl estradiol, 17α-ethinyl- 1,3,5(10)-estratriene-3,17β-diol. (rxlist.com)
21 orange active tablets each containing 0.1 mg of levonorgestrel, d(-)-13β-ethyl-17α-ethinyl-17β- hydroxygon-4-en-3-one, a totally synthetic progestogen, and 0.02 mg of ethinyl estradiol, 17α-ethinyl- 1,3,5(10)-estratriene-3, 17β-diol. (rxlist.com)
ECPs have not been shown to cause a postfertilization event-a change in the uterus that could interfere with implantation of a fertilized egg.29 Some researchers argue that an interference with the implantation of a fertilized egg is unlikely to happen because progestins, whether natural or synthetic, help to sustain pregnancy.30 In addition, there is no evidence that one burst of levonorgestrel without estrogen can prevent implantation. (lifeethics.org)

Emergency contraceptive pills (ECPs)-sometimes simply referred to as emergency contraceptives (ECs) or the morning-after pill-are medications intended to disrupt or delay ovulation or fertilization, which are necessary for pregnancy. (wikipedia.org)
Progestin-only and antiprogestin pills are available specifically packaged for use as emergency contraceptive pills. (wikipedia.org)
Emergency contraceptive pills originally contained higher doses of the same hormones (estrogens, progestins, or both) found in regular combined oral contraceptive pills. (wikipedia.org)
Combined estrogen and progestin pills are no longer recommended as dedicated emergency contraceptive pills (because this regimen is less effective and caused more nausea), but certain regular combined oral contraceptive pills (taken 2-5 at a time in what was called "the Yuzpe regimen") have also been shown to be effective as emergency contraceptive pills. (wikipedia.org)
The U.S. Food and Drug Administration (FDA) approved this off-label use of certain brands of regular combined oral contraceptive pills in 1997. (wikipedia.org)
The FDA currently approves three different types of emergency contraceptive pills: pills that contain only progestin, pills that contain both progestin and estrogen, and pills that contain the antiprogestin- ulipristal acetate. (ourbodiesourselves.org)
Some people call emergency contraceptive pills "morning-after pills. (ourbodiesourselves.org)
These regimens are packaged as Food and Drug Administration labeled, dedicated products or can be adapted for use from standard oral contraceptive pills. (aafp.org)
pregnancy can be prevented even after the intercourse by taking the Emergency Contraceptives pills (EC). (ndri.com)
These pills give the body a short high, bursts of synthetic that disrupts hormone patterns needed for pregnancy. (ndri.com)
Prevention of conception after unprotected intercourse (including known or suspected contraceptive failure) as an emergency contraceptive ("morning-after" pills). (drugs.com)
Dinger J, Minh TD, Buttmann N, Bardenheuer K. Effectiveness of oral contraceptive pills in a large U.S. cohort comparing progestogen and regimen. (medscape.com)
Using pills that contain a man-made (synthetic) form of the hormone progesterone called progestins. (medlineplus.gov)
Two emergency contraceptive pills may be bought without a prescription. (medlineplus.gov)
Investigation Employing Ethinyl Estradiol Combined with dl-Norgestrel.EmErgEncy contracEptivE pills. (rolandjb.tk)
Secondly, if there was an obvious failure of contraceptive like a condom to break, you can use emergency contraceptive, is also called post-coital pills. (ahefv.com)
Modern hormonal contraceptives have a variety of forms: pills (combination containing two hormones, progesterone and estrogen, as well as pure progestogen, or mini-pill), implants (in Russia they are not) and injectable drugs. (ahefv.com)
New progestins for use in combination oral contraceptive pills were specifically developed to reduce androgenic symptoms. (aafp.org)
It is intended for emergency use following unprotected intercourse, contraceptive failure or misuse (such as forgotten pills or torn condoms). (onlinegenericmedicine.com)
Emergency contraceptive pills cannot interrupt an established pregnancy or harm a developing embryo. (onlinegenericmedicine.com)
Emergency contraceptive pills (ECPs) are taken in the absence of birth control pills (BCPs) and after the failure of other contraceptives during intercourse, hence its common reference as "the morning-after pill. (fiqhacademy.com)
LNG is a potent synthetic progestin hormone which is contained in oral contraceptive pills and now widely used for EC. (enciclopediadebioetica.com)
The combined oral contraceptive pills are combinations of oestrogen and progestogen (Q14.3). (2womenshealth.com)

They give the body a short, high burst of synthetic hormones that disrupt natural hormone production needed for ovulation and pregnancy. (ourbodiesourselves.org)
Progestin (alone, or in combination with estrogen) also can prevent ovulation, which is its primary contraceptive quality. (culture-of-life.org)
The aim of this study was to use measurements of urinary steroid glucuronides to confirm the suppression of ovulation in women taking oral contraceptives. (naver.com)
Hormonal birth control methods use a higher concentration of synthetic progesterone and a lower concentration of synthetic estrogens to prevent ovulation. (earthslab.com)
The released progesterone acts similarly to an oral contraceptive by inhibiting ovulation, and the implant is effective for up to five years. (earthslab.com)
The operating principle of the female hormonal contraceptives is that they prevent ovulation. (ahefv.com)
ontraception or birth control prevents preg- biologically active progestogen that inhibits ovu- nancy by interfering with the normal process lation or fertilization and is used as an oral emer- of ovulation, fertilization, and implantation gency contraceptive (EC) (6). (who.int)
Mifepristone as a regular contraceptive at 2 mg daily prevents ovulation (1 mg daily does not). (bionity.com)
The FDA label states that LNG-EC is "believed to act as an emergency contraceptive principally by preventing ovulation or fertilization (by altering tubal transport of sperm and/or ova). (enciclopediadebioetica.com)
Estrogen-progestin methods - Estrogen-progestin contraceptives contain potent synthetic progestins, which suppress ovulation and cause the endometrium to become thin over time. (imreference.com)

ella is a progesterone agonist/antagonist emergency contraceptive indicated for prevention of pregnancy following unprotected intercourse or a known or suspected contraceptive failure. (nih.gov)
One tablet taken orally as soon as possible, within 120 hours (5 days) after unprotected intercourse or a known or suspected contraceptive failure. (nih.gov)

Because of the reported side effects of synthetic analogs called "progestins," there has been interest in replicating the natural hormone for clinical use. (aafp.org)
An oral micronized progesterone preparation has improved bioavailability and fewer reported side effects compared with synthetic progestins. (aafp.org)
Because of the poor oral absorption of progesterone and its susceptibility to rapid first-pass metabolism in the liver, a variety of oral, injectable and implantable synthetic analogs, called "progestins," have been developed. (aafp.org)
Unlike synthetic progestins, micronized progesterone has not been shown to affect mood, 9 decrease high-density lipoprotein (HDL) cholesterol levels 10 , 11 or adversely affect pregnancy outcome. (aafp.org)
Progestins and androgens (natural or, more commonly, synthetic) interfere with the monthly cycle of endometrial thickening, breakdown and bleeding. (justia.com)

Dixon GW, Schlesselman JJ, Ory HW et al: Ethinyl estradiol and conjugated estrogens as postcoital contraceptives. (flightcaster.com)
Several types are available, but the combination pill, which contains both synthetic progesterone and estrogens, is most commonly used. (earthslab.com)
Allen and Doisey identified the "estrus stimulating principle", endogenous estrogens that could activate tumors of the breast, and subsequent research in synthetic chemistry identified nonsteroidal estrogens. (glowm.com)

The antiprogestin ulipristal acetate is available as a micronized emergency contraceptive tablet, effective up to 120 hours after intercourse. (wikipedia.org)
The antiprogestin mifepristone (also known as RU-486) is available in five countries as a low-dose or mid-dose emergency contraceptive tablet, effective up to 120 hours after intercourse. (wikipedia.org)
LNG, a synthetic hormone, lowers chances of pregnancy by 75-89% if taken within three days, although one may take it up to five days after intercourse, [10] while UPA, a "progesterone receptor modulator," [11] lowers chances of pregnancy by 85% if taken within five days post-intercourse. (fiqhacademy.com)

As a result of these changes in the endometrium, estrogen-progestin contraceptives reduce both menstrual flow and uterine contractions at menses, thereby decreasing dysmenorrhea. (imreference.com)

But Ella (generic name ulipristal acetate) is not a synthetic progestin that mimics the action of progesterone. (culture-of-life.org)
Dress them up as 'contraceptives' all you want, progesterone antagonists are abortion drugs. (culture-of-life.org)
Norplant is a set of tiny silicone rods containing synthetic progesterone that are surgically implanted deep to the skin of the arm or over the scapula . (earthslab.com)
Depo-Provera is a synthetic progesterone that is administered by muscular injection at three-month intervals. (earthslab.com)

Anderson FD, Gibbons W, Portman D. Safety and efficacy of an extended-regimen oral contraceptive utilizing continuous low-dose ethinyl estradiol. (medscape.com)
Jick SS, Kaye JA, Russmann S, Jick H. Risk of nonfatal venous thromboembolism in women using a contraceptive transdermal patch and oral contraceptives containing norgestimate and 35 microg of ethinyl estradiol. (medscape.com)
A comparative study of two contraceptive vaginal rings releasing norethindrone acetate and differing doses of ethinyl estradiol. (medscape.com)
about ethinyl estradiol, a synthetic estradiol used most typically in oral contraceptive but also used by. (rolandjb.tk)
21 white LO/OVRAL tablets, each containing 0.3 mg of norgestrel ( dl -13-beta-ethyl-17-alpha-ethinyl-17-beta-hydroxygon-4-en-3-one), a totally synthetic progestogen, and 0.03 mg of ethinyl estradiol (19-nor-17α-pregna-1,3,5 (10)-trien-20-yne-3,17-diol), and 7 pink inert tablets. (drugs.com)

Mifepristone is a synthetic steroid with antiprogestational effects indicated for the medical termination of intrauterine pregnancy through 49 days' pregnancy. (pharmacycode.com)
Mifepristone is a synthetic steroid compound used as a pharmaceutical. (bionity.com)
Gestrinone is a synthetic steroid with mixed progestogen and antiprogestogen (i.e., partial agonist ) effects, and also has some mild androgenic activity. (wikidoc.org)

A birth control patch is a small adhesive skin patch containing the synthetic hormones. (earthslab.com)
A vaginal ring is a soft plastic ring that is wedged into the superior part of the vagina , where it remains and releases synthetic hormones over a three-week period. (earthslab.com)
Only synthetic female hormones are popular as methods of birth control online in Canada. (ahefv.com)
The effects of exogenous hormones in the form of oral contraceptives and hormone replacement therapy (HRT) on breast cancer have been studied extensively. (glowm.com)

Multinational comparative clinical trial of long-acting injectable contraceptives: Norethisterone enanthate given in two dosage regimens and depot-medroxyprogesterone acetate. (naver.com)

It is not advisable to use ECPs as your only protection against pregnancy if you are sexually active or planning to be, because they are not as effective as other contraceptive methods. (ourbodiesourselves.org)

It is a synthetic derivative of triphenylethylene but was originally screened in a drug development program oriented toward discovering new post-coital contraceptive agents. (news-medical.net)

Nine women taking long-term oral contraceptive steroids (Trinordiol) were studied during a cycle while taking cotrimoxazole (1 gm twice daily) and the results were compared to. (naver.com)
Abernethy DR, Greenblatt DJ, Divoli M, Arendt R, Ochs HR, Shader RI(1982)Impairment of diazepam metabolism by low-dose estrogen-containing oral contraceptive steroids. (springer.com)
Back DJ, Breckenridge AM, Crawford FE, Orme MLE, Rowe PH(1980d)Phenobarbitone interaction with oral contraceptive steroids in the rabbit and rat. (springer.com)

Chemical contraceptives, both long-term and emergency, use a synthetic version of the hormone progestin. (culture-of-life.org)
[1] [2] DES is a synthetic form of the female hormone estrogen that was prescribed to pregnant women between about 1940 and 1971 to prevent miscarriage and premature labor. (cdc.gov)
The most frequently used oral preparations, 17α-ethynylestradiol and its 3-methyl ether, are synthetic derivatives of the natural hormone. (google.com)

Standard contraindications for use of combined oral contraceptives (class label). (clinicaltrials.gov)
Exclusion criteria were use of oral contraceptives or hepatic enzyme inducing drugs, chronic adrenal failure, long term corticosteroid treatment, breast feeding, allergy, or contraindications to mifepristone or to oestrogen and progestogen. (bmj.com)
Three main considerations commonly arise in discussions of contraceptive methods: method safety and contraindications, failure rates, and return to fertility. (nursingcenter.com)

The contraceptive regimen consists of 1 dose every 3 months. (medscape.com)
Brooks M. FDA Okays New Extended-Regimen Oral Contraceptive. (medscape.com)

Birth control methods may be categorized into several groups based on their mode of action: hormonal, chemical and behavioral contraceptive methods, anti-implantation devices, sterilization, and induced abortion. (earthslab.com)
Depending on their constituents this type of a contraceptive pill works by interfering either in the ovulatory, fertilization or implantation process. (onlinegenericmedicine.com)

Ten Egyptian women who were using the injectable contraceptive norethisterone oenanthate (NET-OEN) for at least 6 months were monitored weeekly for a period of 12 weeks. (naver.com)

Aside from abortifacients, herbal contraceptives in folklore have also included a few preventative measures. (wikidoc.org)

The use of safe, effective emergency postcoital contraceptive methods could result in 1 million fewer abortions and 2 million fewer unintended pregnancies each year in the United States. (aafp.org)
Contraceptive methods are designed to prevent sperm from reaching and penetrating a secondary oocyte, which leads to the formation of an ovum. (earthslab.com)
Firstly, when using both of two methods dramatically increases contraceptive reliability, because it is extremely unlikely that just two tools will fail simultaneously. (ahefv.com)
Newer contraceptive methods and new techniques for old methods (such as hysteroscopic sterilization) are attractive to patients, and their contraceptive provider (or referring provider) should have a grasp of the wide range of options. (netce.com)
The efficacy of these contraceptive methods, except sterilization, the IUD , and Norplant System, depends upon the reliability with which they are used. (rxlist.com)
It describes the major categories of nonpermanent contraceptive methods and provides evidence-based updates. (nursingcenter.com)
An important source for data about method safety comes from the Centers for Disease Control and Prevention (CDC): the U.S. Medical Eligibility Criteria for Contraceptive Use (U.S. MEC), 8 which categorizes the safety of contraceptive methods in accordance with the specific health concerns of patients (see Table 1 8 ). (nursingcenter.com)

Contraceptive Norethindrone Acetate Online. (rolandjb.tk)

Abstract Norplant® is the brand name of the world's first registered subdermal hormonal contraceptive implant, developed by the laboratories of the Population Council, an international organisation working in the area of fertility and population growth. (bvsalud.org)

The copper intrauterine device, or IUD, is a long-term, reversible contraceptive first introduced by Howard Tatum and Jamie Zipper in 1967. (asu.edu)
Many men say they would prefer a daily pill as reversible contraceptive, rather than long-acting injections or topical gels, which are also in development," she noted. (medscape.com)

[6] It is a synthetic and nonsteroidal estrogen of the stilbestrol group, and differs from the natural estrogen estradiol in various ways. (wikipedia.org)
Fenestrel ( INN , USAN ) (developmental code name ORF-3858 ) is a synthetic , nonsteroidal estrogen that was developed as a postcoital contraceptive in the 1960s but was never marketed. (rug.nl)

1 The composition of the vaginal flora, and therefore the pH, may alter for a number of reasons such as age (e.g. the pH is more alkaline in prepubertal children and postmenopausal women), menstruation, sexual activity (blood and semen are slightly alkaline), contraceptive method, medicines and stress. (bpac.org.nz)

basa en la administración combinada de etinil estradiol. (rolandjb.tk)

These findings, together with evidence showing an association between later maternal age at birth and increased breast cancer risk in daughters have been used to suggest that in utero exposure to the potent, synthetic estrogen, DES, may be associated with increased breast cancer risk. (diethylstilbestrol.co.uk)

Emergency Contraceptives reduce the likelihood of becoming pregnant but do not protect against sexually transmitted diseases. (ndri.com)

60 casos fueron realizados en los años 2007 y 2008 sin evaluación histeroscopica de la cavidad endometrial 380 casos en los años 2009, 2010 y 2011 con evaluación histeroscopica, no considerando aptas para colocación pacientes con miomas submucosos irresecables. (bvsalud.org)
They are not now available but may still be found in situ in some older users Pharmacologically active devices The addition of copper to a contraceptive device produces a direct effect on the endometrium by interfering with endometrial oestrogen-binding sites and depressing uptake of thymidine into DNA. (slideplayer.com)
Nonorganic endometrial bleeding during the use of oral contraceptives. (utah.edu)

These corticosteroids are synthetic and much more potent than steroids naturally occurring in the body and typically last much longer. (flightcaster.com)
Akpoviroro JO, Mangalam M, Jenkins N, Fotherby K(1981)Binding of the contraceptive steroids medroxyprogesterone acetate and ethynyloestradiol in blood of various species. (springer.com)
Ester bound to the Testosterone chemical structure negative side effects we experience with steroids which can literally destroy result, which indicates an exceptionally high concentration of augmented natural or synthetic testosterone. (rioloft.com)

5 549 leukotriene receptor antagonist selective oestrogen contraceptive pill Retinol is retained. (imagenenaccion.org)

Kovalevsky G, Barnhart K. Norplant and other implantable contraceptives. (medscape.com)

The purpose of this course is to provide healthcare professionals with the information necessary to advise patients and prescribe effective and appropriate contraceptives. (netce.com)
Oral contraceptives are highly effective. (rxlist.com)

Barrier contraceptives prevent the ingress of live sperm in the uterus. (ahefv.com)
Zavos, P.M. and Cohen, M.R.: Sperm penetration during the performance of the fractional postcoital test and the Sims-Huhner test. (zavos.org)

These problems tend to manifest themselves at the dosage levels needed to achieve the desired primary estrogenic and contraceptive effects. (google.com)

With long-term use as an oral contraceptive reduces the risk of inflammation of the pelvic organs, iron deficiency anemia, reduces the likelihood of fibro-cystic mastopathy, neoplasms of the ovaries and endometrium, incl. (drdoping.com)

However, research suggests that emergency contraceptives have no long-term effects on the pregnancy or developing baby. (medlineplus.gov)
While at the Tribute to to evaluate response order, Nicole and Paris are a such original aircraft to his contraceptive sharing a 1,200-metre-long long-term heist and a summer to make to Janet Leding for Mother's X. Kent not 's out what they said and as content, he is the conseils 're not at the paper guilt. (newviewgraphics.com)
Some studies suggest that the long-term use of oral contraceptives in young women before their first pregnancy may increase breast cancer risk. (glowm.com)

Combination oral contraceptives act by suppression of gonadotropins. (drugs.com)

S9005 Mifepristone in Meningioma - Full Text View - ClinicalTrials.gov (clinicaltrials.gov)

Cheap anabolic supplements - Oral Steroids (flightcaster.com)

NAVER Academic > Search... (academic.naver.com)

Search | The Embryo Project Encyclopedia (embryo.asu.edu)

Diethylstilbestrol - Wikipedia (en.m.wikipedia.org)

DES 1st generation Archives - Diethylstilbestrol DES (diethylstilbestrol.co.uk)

Diethylstilbestrol syndrome | Genetic and Rare Diseases Information Center (GARD) - an NCATS Program (phgkb.cdc.gov)

Private Drugstore: Chemical name of viagra all brand pills! (meownowfl.org)

Diseases5

Chemicals and Drugs40

Analytical, Diagnostic and Therapeutic Techniques and Equipment23

Psychiatry and Psychology7

Phenomena and Processes15

Disciplines and Occupations1

Anthropology, Education, Sociology and Social Phenomena2

Technology, Industry, Agriculture2

Information Science4

Named Groups2

Health Care13

Antimutagenic effects of centchroman--a contraceptive and a candidate drug for breast cancer in multiple mutational assays. (1/25)

CDB-2914: anti-progestational/anti-glucocorticoid profile and post-coital anti-fertility activity in rats and rabbits. (2/25)

A single mid-follicular dose of CDB-2914, a new antiprogestin, inhibits folliculogenesis and endometrial differentiation in normally cycling women. (3/25)

Circulating concentrations of the antiprogestins CDB-2914 and mifepristone in the female rhesus monkey following various routes of administration. (4/25)

Emergency postcoital contraception. (5/25)

Pharmacokinetic study of different dosing regimens of levonorgestrel for emergency contraception in healthy women. (6/25)

Post-coital administration of levonorgestrel does not interfere with post-fertilization events in the new-world monkey Cebus apella. (7/25)

Mechanisms of action of mifepristone and levonorgestrel when used for emergency contraception. (8/25)

Contraceptives, Postcoital

Contraceptives, Postcoital, Hormonal

Contraceptives, Oral

Coitus

Contraceptives, Oral, Combined

Metrorrhagia

Contraceptive Agents

Menstruation-Inducing Agents

Contraceptives, Oral, Hormonal

Contraceptives, Postcoital, Synthetic

Contraceptive Agents, Female

Uterine Hemorrhage

Ethinyl Estradiol

Contraceptives, Oral, Synthetic

Contraceptive Devices

Contraception

Contraceptive Devices, Female

Contraception, Postcoital

Contraception Behavior

Contraceptive Agents, Male

Intrauterine Devices

Family Planning Services

Desogestrel

Norgestrel

Levonorgestrel

Pregnancy

Mestranol

Norethindrone

Vaccines, Contraceptive

Pregnancy, Unplanned

Sterilization, Reproductive

Pregnancy, Unwanted

Medroxyprogesterone Acetate

Spermatocidal Agents

Norethynodrel

Menstruation

Intrauterine Devices, Copper

Ethynodiol Diacetate

Contraception, Immunologic

Abortion, Induced

Norpregnenes

Progestins

Ethinyl Estradiol-Norgestrel Combination

Synthetic Biology

Contraceptives, Oral, Sequential

Sterilization, Tubal

Genes, Synthetic

Progesterone Congeners

Androstenes

Menstrual Cycle

Parity

Intrauterine Devices, Medicated

Health Knowledge, Attitudes, Practice

Contraceptive Devices, Male

Megestrol

Pregnancy in Adolescence

Menstruation Disturbances

Drug Implants

Sex Education

Medroxyprogesterone

Estradiol Congeners

Spermatogenesis-Blocking Agents

Ovulation Inhibition

Norpregnadienes

Fertility

Condoms

Sexual Behavior

Transdermal Patch

Ethisterone

Molecular Sequence Data

Estrogens

Amino Acid Sequence

Risk Factors

Time Factors

Nonoxynol

Abortion Applicants

Xanthurenates

Peptides

Age Factors

Abortion, Legal