AnatomyOrganismsDiseasesChemicals and DrugsAnalytical, Diagnostic and Therapeutic Techniques and EquipmentPsychiatry and PsychologyPhenomena and ProcessesDisciplines and OccupationsAnthropology, Education, Sociology and Social PhenomenaTechnology, Industry, AgricultureHumanitiesInformation ScienceNamed GroupsHealth Care
FertilizationFertilization in VitroSpermatozoaSperm-Ovum InteractionsOvumOocytesEmbryo TransferZygoteZona PellucidaSperm Injections, IntracytoplasmicSperm MotilityPregnancySea UrchinsPregnancy RateAcrosomeCleavage Stage, OvumAcrosome ReactionFertilizersSperm CapacitationInfertility, FemaleEmbryonic DevelopmentCryopreservationBlastocystOvulation InductionInfertility, MaleInfertilityEgg ProteinsMicroinjectionsEmbryo ImplantationFertilityVitelline MembraneEmbryonic and Fetal DevelopmentParthenogenesisSperm HeadPregnancy OutcomeSemen PreservationOocyte RetrievalOogenesisInsemination, ArtificialFollicular FluidReproductive TechniquesUrochordataStarfishEmbryo, MammalianFallopian TubesMeiosisOvuleOvarian FollicleMenotropinsOvulationChorionic GonadotropinSemenOocyte DonationCumulus CellsAcrosinReproductive Techniques, AssistedEmbryo Culture TechniquesSperm CountSperm TransportInseminationEchinodermataSuperovulationIn Vitro Oocyte Maturation TechniquesOvaryLive BirthReproductionFollicle Stimulating HormoneEpididymisOligospermiaPollen TubeMicromanipulationPregnancy, MultipleFallopian Tube DiseasesEmbryo, NonmammalianSperm TailContraception, ImmunologicOvarian Hyperstimulation SyndromeBlastomeresEjaculationMetaphaseGerm Cells, PlantSpermatidsTestisFertility Agents, FemaleCryoprotective AgentsCytoplasmCattleSeminal Plasma ProteinsPollenTime FactorsCalciumSperm MaturationBufo arenarumSeedsAbortion, SpontaneousSemen AnalysisSurrogate MothersMorulaGonadotropinsSperm Retrieval
Vitro fertilisationEmbryosSpermMaturationIntercourseOvulationPreimplantation embryo developmentOocytesDelayed implantationReproductionSpeciesArtificialRegulatesDifferentiationOccurReproductiveDevelopmentCopulationDimorphismPregnancyImpedeArousalMisconductMammalsWoman'sJuvenilesOrgansMaturityEggsContradictPrenatalProcreationDistinctUltimatelyCharacteristicsMaleBehaviorMechanismGymnospermsIndependentlyProcessOrientationAllegationsDifferencesScientistSelectionFormCatholicSeed plantsWomen
Vitro fertilisation4
  • A hearing in the Inter-American Court of Human Rights to follow up on compliance with its ruling that Costa Rica's ban on in vitro fertilisation violates a number of rights. (ipsnews.net)
  • SAN JOSE, Sep 15 2015 (IPS) - After banning in vitro fertilisation for 15 years and failing to comply with an Inter-American Court of Human Rights ruling for nearly three years, Costa Rica will finally once again allow the procedure for couples and women on their own. (ipsnews.net)
  • In November 2012, the Court ruled that the ban on in vitro fertilisation (IVF) violated the rights to privacy, liberty, personal integrity and sexual health, the right to form a family, the right to be free from discrimination, and the right to have access to technological progress. (ipsnews.net)
  • Her now ex-husband, Miguel Mejías, declared before the Court that he had mortgaged his home and spent all his savings for the couple to undergo in vitro fertilisation in Costa Rica, but before they were able to do so, the practice was declared illegal. (ipsnews.net)
Embryos5
  • Sea urchin embryos have been used for more than a century in the study of fertilization and early development. (nih.gov)
  • Five days after fertilization, embryos turn to be blastocysts. (bangkokhospital.com)
  • In the 2010s, thanks to the invention of vitrification (mostly developed at Prelude labs) and genetic sequencing of embryos, we are launching the second sexual revolution and decoupling procreation from sex. (martinvarsavsky.net)
  • These "pre-embryos" can be easily obtained using donated "surplus" IVF-embryos, or by creating our own by means of either sexual reproduction (e.g. (lifeissues.net)
  • 2. Transcriptional sexual dimorphism in elongating bovine embryos: implications for XCI and sex determination genes. (nih.gov)
Sperm30
  • Following the initial fertilization event, the second sperm nucleus is diverted to fertilize an additional egg nucleus found in the egg cytoplasm. (wikipedia.org)
  • Assuming that functional sperm are introduced to a viable ovum, the next question is whether fertilization will occur normally in the space environment. (medscape.com)
  • These often refer to in vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI) - a specialized form of IVF. (bangkokhospital.com)
  • After the egg is released, it travels down the fallopian tube, where fertilization by a sperm cell may occur. (bangkokhospital.com)
  • Fertilization process is the union of an egg and sperm, usually occurring in the ampulla of the fallopian tube. (bangkokhospital.com)
  • In vitro fertilization is a process of external fertilization where an egg is combined with sperm outside the body, in vitro. (bangkokhospital.com)
  • The strongest sperm will penetrate the egg membrane, allowing for fertilization process. (bangkokhospital.com)
  • C - E ) Worms fed OP50 had more progeny ( C ), slower fertilization rates ( D ), and more sperm ( E ) than worms fed CS180. (elifesciences.org)
  • When she is ten, we will have the "lab talk," because Mia, like 5 million other children in the world so far, was made from Nina´s eggs and my sperm at an in vitro fertilization lab. (martinvarsavsky.net)
  • Since even a small male can produce more than enough sperm to fertilize a huge number of eggs, while a female's egg output increases greatly with an increase in size, this strategy makes sense for an organism (fish in general) where over 90% of the eggs laid will not result in a fish that reaches sexual maturity. (t-vox.org)
  • IVF is a multistep process involving ovarian stimulation, ovulation induction, collection of oocytes, fertilization with sperm, and transfer of the fertilized oocytes to the uterus for implantation and maturation. (uspharmacist.com)
  • The oocytes are removed from the follicles by aspiration and incubated with sperm to enable fertilization. (uspharmacist.com)
  • Most recently, we have also begun working on cycads, in particular the fertilization fluids in which their giant sperm swim. (uvic.ca)
  • Large numbers of tiny sperm can increase the probability of successful fertilization, especially when females mate with several males. (phys.org)
  • This sperm competition spurs sexual selection after mating, favoring the best sperm in the female reproductive tract. (phys.org)
  • However, such examples contradict the common understanding of sexual selection because fewer sperm vying to fertilize an egg should relax the selection pressure on sperm to be more successful than their competitors. (phys.org)
  • Together with Scott Pitnick and other scientists from Syracuse University and George Washington University in the USA, he managed to demonstrate that sexual selection has a major influence on the evolution of sperm length in fruit flies. (phys.org)
  • And each mating creates an opportunity for sexual selection via sperm competition . (phys.org)
  • In fruit flies, for instance, longer sperm are really good at displacing their competitors from the female reproductive tract, which gives them an advantage in the competition for fertilization. (phys.org)
  • Sexual selection thus favors longer sperm," explains Stefan Luepold, first author of the study. (phys.org)
  • These complex relationships can maintain, if not intensify, sexual selection even when only very few sperm end up competing for fertilization. (phys.org)
  • The evolution of sperm is ultimately based on similar processes as other male sexual traits such as horns to frighten away rivals and ornaments to attract females. (phys.org)
  • Compared to these and numerous other exaggerated sexual traits, fruit-fly sperm are probably the most extreme example in the animal kingdom," finds Luepold. (phys.org)
  • Stefan Lüpold et al, How sexual selection can drive the evolution of costly sperm ornamentation, Nature (2016). (phys.org)
  • Human animals have a simple, direct system: copulation and sperm delivery may lead to fertilization of an egg, if the timing is right. (juneauempire.com)
  • Delays between copulation and fertilization usually involve delayed ovulation and sperm storage (although mammals have less capacity for sperm storage than many other animals). (juneauempire.com)
  • In addition to its role in sexual development, testosterone also influences sperm production, sexual function, and libido. (secec.org)
  • Low testosterone can have detrimental effects on fertility, including decreased sperm production, impaired sperm quality, and reduced sexual function. (secec.org)
  • In addition to its role in sperm production, testosterone also affects fertility through its effects on sexual function. (secec.org)
  • Overall, testosterone is vital for male fertility as it regulates the production of sperm, promotes sexual function, and maintains overall reproductive health. (secec.org)
Maturation5
  • Here, we present an overview of the development of a rapidly developing echinoderm species, Lytechinus pictus, from fertilization through sexual maturation. (nih.gov)
  • This staging scheme lays a foundation for future studies in L. pictus, which share many of the attractive features of other urchins but have the key advantage of rapid development to sexual maturation. (nih.gov)
  • Thus, FSH is essential for sexual maturation and reproduction in both men and women. (nih.gov)
  • LH is used clinically in assisted reproduction techniques (ART) and in vitro fertilization (IVF) to stimulate ovarian follicle maturation. (nih.gov)
  • 1998. Influence of organochlorine pesticides on maturation and post-fertilization development of bovine oocytes in vitro . (cdc.gov)
Intercourse6
  • His overriding commitment to this reproductive health-evidenced by, for example, the "contraception" mandate-presupposes that women will and should have lots more sexual intercourse than they have interest in conceiving children. (thepublicdiscourse.com)
  • It was not clear to the women whether he was asking about impregnating the women through sexual intercourse or in vitro fertilization. (politico.com)
  • Emergency contraception, also known as postcoital contraception, is therapy used to prevent pregnancy after an unprotected or inadequately protected act of sexual intercourse. (acog.org)
  • They may recommend waiting a number of months or longer before trying to have a child by natural means or until resuming unprotected sexual intercourse. (cancer.org)
  • Natural Family Planning is a general term that has been adopted to describe methods of menstrual cycle observation combined with planned sexual intercourse or abstinence, based upon the desire of the couple to either achieve or avoid pregnancy. (diocesecc.org)
  • Overview of Infertility Infertility is usually defined as the inability to conceive after 1 year of regular, unprotected sexual intercourse. (msdmanuals.com)
Ovulation3
Preimplantation embryo development1
  • 1. Transcriptional sexual dimorphism during preimplantation embryo development and its consequences for developmental competence and adult health and disease. (nih.gov)
Oocytes1
  • In vitro fertilization (IVF) is a form of assisted reproductive technology in which a woman's reproductive system is artificially stimulated to produce oocytes, which are extracted, fertilized in a laboratory, and then implanted in the uterus. (uspharmacist.com)
Delayed implantation1
Reproduction10
Species3
  • fertilization is external for most species. (marinespecies.org)
  • In zoology, a hermaphrodite is an organism of a species whose members possess both male and female sexual organs during their lives. (t-vox.org)
  • The scientists combined experimental, quantitative genetic and comparative studies on sexual traits in various Drosophila species. (phys.org)
Artificial4
  • To summarize, Pope Paul VI was able to draw out consequences from moral principles what could happen in a marriage relationship if artificial contraceptive practices continue to be a part of the couple's sexual relationship. (diocesecc.org)
  • 15. Artificial light at night alters the sexual behaviour and fertilisation success of the common toad. (nih.gov)
  • Last night, we provided assistance with the artificial insemination of Ying Ying to further increase the chance of fertilization. (oceanpark.com.hk)
  • Artificial fertilization techniques are part of modern life. (bvsalud.org)
Regulates1
  • AWA modulates fertilization rates at least partly in parallel to insulin receptor signaling, since the insulin receptor DAF-2 regulates fertilization independently of food type, which requires ILPs other than INS-6. (elifesciences.org)
Differentiation2
  • Even body morphology was supposed to follow along with this paradigm of sexual differentiation. (hawaii.edu)
  • This was later revealed to be untrue (see Sexual differentiation). (t-vox.org)
Occur2
  • [ 39 ] For example, although Aimar and colleagues found that fertilization in a microgravity environment did occur in their animal model, they also noted that "several characteristics of the fertilization process" were different in space. (medscape.com)
  • Usually, self-fertilization does not occur. (t-vox.org)
Reproductive3
  • Guiding principles for Catholic morality regarding reproductive problems include not separating the sexual act from the reproductive act, and respect for the human dignity of both the parents and the child. (catholicnewsagency.com)
  • It is a hormone primarily produced in the testicles and is responsible for the development of male reproductive organs and secondary sexual characteristics. (secec.org)
  • Synthetic forms of GnRH have been used with the gonadotropins in assisted reproductive techniques and in vitro fertilization. (nih.gov)
Development17
  • Research has established the broad mammalian developmental plan that genes on the sex chromosomes influence gonad development which determines gonadal hormone production (or its absence) leading to modification of the genitalia and simultaneously biasing the nervous system to organize adult sexual behavior. (hawaii.edu)
  • In this essay we probe those areas of sexual development that are neither differentiated by hormones nor activated by them. (hawaii.edu)
  • One major issue is to comprehend, particularly in regard to behavior, factors which are important influences on sexual expression and the development of sex differences. (hawaii.edu)
  • It is the purpose of this discourse to discuss aspects of sexual development and to offer insight as to why understanding such processes is much more complicated than initially assumed. (hawaii.edu)
  • These now-classic papers, along with many others, established the broad developmental plan that, at least for mammals, the following pathway occurs: genes on the sex chromosomes influence gonad development which determines gonadal hormone production (or its absence) leading to modification of the internal and external genitalia and simultaneously biasing the nervous system to organize adult sexual behavior (see e.g. (hawaii.edu)
  • Research on echinoderms has contributed to the overall knowledge of animal fertilization and development. (eol.org)
  • Sexual disruption is defined as disruption of gonadal development in terms of either altered duct formation and/or development of ovotestis. (nih.gov)
  • It contributes to the development and maintenance of a healthy libido, as well as the ability to achieve and sustain an erection during sexual activity. (secec.org)
  • Androgenic effects, on the other hand, are responsible for the development of male secondary sexual characteristics, such as facial hair growth, deepening of the voice, and increased libido. (secec.org)
  • Ovotesticular disorder of sexual development, which was previously termed "intersex," describes disorders in which there is a discrepancy between a person's phenotype, genetic material, and gonads. (medscape.com)
  • Such gonads are found exclusively in people with ovotesticular disorder of sexual development (OT-DSD), formerly known as true hermaphroditism. (medscape.com)
  • Patients with ovotesticular disorder of sexual development are individuals who have both ovarian and testicular tissue. (medscape.com)
  • Many patients with ovotesticular disorder of sexual development have a uterus. (medscape.com)
  • This unusual sexual mode has the potential to provide unique insights into the regulation of vertebrate sexual development, and also lends itself to genetics. (bvsalud.org)
  • 3. Developmental consequences of sexual dimorphism during pre-implantation embryonic development. (nih.gov)
  • 11. Sex and the preimplantation embryo: implications of sexual dimorphism in the preimplantation period for maternal programming of embryonic development. (nih.gov)
  • 19. Epigenetic aspects of fertilization and preimplantation development in mammals: lessons from the mouse. (nih.gov)
Copulation1
Dimorphism3
  • 8. Establishing sexual dimorphism in humans. (nih.gov)
  • 12. Genetic architecture of sexual dimorphism in a subdioecious plant with a proto-sex chromosome. (nih.gov)
  • 20. [Sexual dimorphism in the XXI(st) century]. (nih.gov)
Pregnancy2
Impede2
Arousal2
  • One area is the hypothalamus, which is important in basic bodily processes like hunger, sleep, and sexual arousal. (thedoctorwillseeyounow.com)
  • 1999. Methoxychlor given in the pre- implantation period blocks sexual arousal in male mice. (cdc.gov)
Misconduct2
  • Specifically, John and Shane address the revelations from the independent investigation into allegations of Ravi Zacharias participating in sexual misconduct. (breakpoint.org)
  • He became the third lawmaker this week alone to announce that he will step down after being accused of sexual misconduct. (politico.com)
Mammals2
  • Gonadal dysgenesis , a type of intersexuality formerly known as " True Hermaphroditism ", occurs in about one percent of mammals (including humans), but it is extremely rare for both sets of sexual organs to be functional, usually neither set is functional. (t-vox.org)
  • Known fertilization delays in mammals range from eleven days (in dogs) to over two hundred days (in a bat). (juneauempire.com)
Woman's1
  • The clitoris is a woman's most sensitive erogenous zone and the main anatomical source of sexual pleasure. (psychologytoday.com)
Juveniles1
  • Juveniles reach sexual maturity at 4 to 6 months of age, depending on individual growth rate. (nih.gov)
Organs2
  • instead, the temperature of the surrounding sand ultimately determines which sexual organs a baby sea turtle develops. (extremetech.com)
  • The organism has both male and female sexual organs at the same time as an adult. (t-vox.org)
Maturity1
  • 19 Mar 2011 - Hong Kong) Ocean Park is happy to announce that Ying Ying, the 5-year-old female giant panda, has been observed to display signs of sexual maturity and upon examination, is confirmed to be entering her estrous cycle for this year while Le Le also appears to be sexually mature. (oceanpark.com.hk)
Eggs3
Contradict1
  • These clubs would contradict the sexual morality that every Catholic institution is obliged before God and the Church to teach, by word and by deed. (thepublicdiscourse.com)
Prenatal1
  • A third milestone was provided by the findings of Phoenix, Goy, Gerall, and Young (1959) that endogenous prenatal hormones are crucial in the organization of adult sexual behaviors. (hawaii.edu)
Procreation2
  • In the 60s, with the invention of the pill, the sexual revolution was launched-a revolution that decoupled sex from procreation. (martinvarsavsky.net)
  • Sexual intimacy in marriage shares the dual role of unity and procreation. (oakdiocese.org)
Distinct2
  • Their experiments show convincingly that the effects of food type on oogenesis and fertilization are controlled by distinct cellular and molecular pathways. (elifesciences.org)
  • Example: Wrasses (Family Labridae ) are reef fish that tend to have three distinct sexual types. (t-vox.org)
Ultimately1
  • And many more things that ultimately may relate to sexual orientation. (scienceblogs.com)
Characteristics2
  • Surveys of U.K. rivers have shown a high incidence of sexual disruption in populations of wild roach ( Rutilus rutilus ) living downstream from wastewater treatment works (WwTW), and the degree of intersex (gonads containing both male and female structural characteristics) has been correlated with the concentration of effluent in those rivers. (nih.gov)
  • The temperature of the sand making up a turtle's nest impacts the sexual characteristics each baby is born with. (extremetech.com)
Male3
  • In a very small sample (n = 4) of male astronauts, significant decreases in testosterone levels and sexual drive during flight were documented. (medscape.com)
  • They do not practice self-fertilization, but when they find a mate, the pair takes turns between which one acts as the male and which acts as the female through multiple matings, usually over the course of several nights. (t-vox.org)
  • But in the meantime, one suggestion is that the delays allow opportunities for post-copulatory sexual selection (including female choice and male competition), which is a sub-category of natural selection. (juneauempire.com)
Behavior2
  • Bob himself dedicated much of his life to understanding sexual behavior. (hawaii.edu)
  • All these factors affect the internal workings of the individual and intervene in structuring how the social environment might or might not modify sexual behavior. (hawaii.edu)
Mechanism2
Gymnosperms1
  • The more primitive process of double fertilization in gymnosperms results in two diploid nuclei enclosed in the same egg cell. (wikipedia.org)
Independently1
  • The rejection of the anthophyte hypothesis, which identifies gnetales and angiosperms are sister taxa, leads to speculation that the process of double fertilization is a product of convergent evolution and arose independently among gnetophytes and angiosperms. (wikipedia.org)
Process2
  • Due to the limitations of the light microscope, there were many unanswered questions regarding the process of double fertilization. (wikipedia.org)
  • Because of the complex interplay of the various drugs used to replicate the different stages of the fertilization process, pharmacists should be an active part of the IVF healthcare team. (uspharmacist.com)
Orientation3
  • The details of social norms, i.e., what categories of sexual orientation exist around you. (scienceblogs.com)
  • These things are not mutually exclusive and the list is not exhaustive of that which relates to sexual orientation. (scienceblogs.com)
  • But in some individuals (but not all) it also happens to be the final ontogenetic link in the chain to a particular sexual orientation that in the sociocultural context that the 409 pairs of men live in results in gayosity. (scienceblogs.com)
Allegations1
  • New details about the controversy surrounding Rep. Trent Franks come as sexual harassment allegations have engulfed Capitol Hill. (politico.com)
Differences1
Scientist1
Selection1
  • These new findings reveal that the general understanding of sexual selection needs to be broadened. (phys.org)
Form1
  • During fertilization, the sex cell of the father combines with the sex cell of the mother to form a new cell, the zygote, which eventually develops into an embryo. (encyclopedia.com)
Catholic1
  • Catholic Charities in Boston and Washington, D.C., already have been martyred by the "gay" version of "equal sexual liberty. (thepublicdiscourse.com)
Seed plants1
Women1
  • Research on progestin-only regimens for occasional postcoital use by women having infrequent sexual inter-course also began at approximately the same time 8 . (acog.org)