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Corpus Luteum MaintenanceCorpus LuteumMenstrual CycleEndometriumProgesteroneLuteal PhaseLuteolysisCorpus Luteum HormonesMenstruationLuteal CellsEndometriosisCorpus CallosumDinoprostPseudopregnancyPregnancyImmunohistochemistryDeciduaUterusEmbryo ImplantationEstrusEstrous CycleStromal CellsEstradiolAgenesis of Corpus CallosumRNA, MessengerOvaryFollicular PhasePregnancy, AnimalChorionic GonadotropinCattleOvarian FollicleLuteinizing HormoneOvulationMyometriumMatrix Metalloproteinases, SecretedEndometrial HyperplasiaEndometrial NeoplasmsFallopian TubesReceptors, ProgesteronePregnancy ProteinsUterine DiseasesLuteolytic AgentsOxytocinPeritoneal DiseasesGene Expression3-Hydroxysteroid DehydrogenasesGranulosa CellsMedroxyprogesterone AcetateReverse Transcriptase Polymerase Chain ReactionInfertility, FemalePregnancy Trimester, FirstEpitheliumIn Situ HybridizationSheepMacropodidaeRelaxinDiestrusTheca CellsCholesterol Side-Chain Cleavage EnzymeCells, CulturedReceptors, LHGene Expression RegulationProstaglandins FMarsupialiaLeiomyomaCloprostenolMacaca mulattaLuteinizationProlactin

Luteal phaseMenstrual cycleProgesteroneUterusFolliclePlacentaOvulationOvaryOvarianEndometriumPregnancyProliferativeEstrogenOccurFunctionEventsDevelopmentImportantCyclesPresentLutealGranulosaUterinePrimary

Luteal phase15

• In luteal phase dysfunction (LPD), the inadequate secretory transformation of the endometrium results from deficient progesterone production. (medscape.com)
• The patient may report menstrual cycles of less than 26 days or a luteal phase of less than 11 days by basal body temperatures. (medscape.com)
• Serum progesterone levels have been studied as a means to diagnose luteal phase deficiency. (medscape.com)
• However, data show that 6-10% of women who are fertile demonstrate an inadequate luteal phase, which confirms the need for a better understanding of normal variations in the menstrual cycle and in variations that could be pathologic. (medscape.com)
• The following mechanisms can cause an inadequate endometrial response to hormonal stimulation during the luteal phase. (medscape.com)
• A deficiency results in low-to-absent progesterone production and a luteal phase defect. (medscape.com)
• however, a 1991 symposium hypothesized that luteal phase deficiency (LPD) occurs in 3-10% of infertile patients, and healthy women have deficient luteal phase production of progesterone on a sporadic basis. (medscape.com)
• Luteal phase deficiency affects women of all races. (medscape.com)
• Luteal phase deficiency affects only women. (medscape.com)
• Luteal phase deficiency primarily affects women during their reproductive years. (medscape.com)
• At the luteal phase or secretory phase of the menstrual cycle the predominant hormone is progesterone. (berkleycenter.com)
• Progesterone is secreted during the luteal phase of the menstrual cycle. (proprofs.com)
• During the luteal phase of the cycle, the source of the estradiol is the corpus luteum. (proprofs.com)
• during the luteal phase, estrogens are synthesized by the corpus luteum. (clinicalgate.com)
• Collectively, these studies demonstrate that the rate of endothelial cell proliferation is highest during corpus luteum formation, then decreases and remains low during the mid-luteal phase and structural regression of the corpus luteum. (biomedcentral.com)

Menstrual cycle5

• Whereas the follicular phase of the menstrual cycle can vary in length, the secretory phase lasts approximately 14 days, correlating with the life span of the corpus luteum. (medscape.com)
• Between menarche and menopause the ovaries regularly alternate between luteal and follicular phases during the monthly menstrual cycle. (wikipedia.org)
• Abruptio Placentae refers to the premature separation of the placenta from the uterus, Multigravida refers to a woman who has been pregnant more than once, and Proliferative phase refers to a stage of the menstrual cycle. (proprofs.com)
• The increase in temperature occurs as a result of elevated progesterone levels during the luteal (secretory) phase of the menstrual cycle. (proprofs.com)
• Precisely timed alterations in the secretion of these hormones are responsible for coordinating the structural and secretory changes that occur throughout the menstrual cycle. (clinicalgate.com)

Progesterone11

• Following ovulation, the mature ovarian follicle forms the corpus luteum, which becomes a blood-filled structure that allows the precursor cholesterol to be obtained, initiating steroidogenesis and resulting in progesterone production. (medscape.com)
• Presumably, progesterone prepares the endometrium for implantation and maintenance of a pregnancy. (medscape.com)
• If pregnancy occurs, the production of progesterone from the corpus luteum continues for 7 weeks because of the tonic release of luteinizing hormone (LH) from the pituitary gland. (medscape.com)
• Because the corpus luteum is not a de novo structure but is a direct result of the follicle, it shows the effects of abnormal folliculogenesis with decreased progesterone production. (medscape.com)
• [ 1 ] The inadequate secretory transformation of the endometrium, resulting from deficient progesterone production, has been implicated in both infertility and recurrent pregnancy loss. (medscape.com)
• After ovulation, the oocyte lives for 24 hours or less without fertilization, while the remains of the dominant follicle in the ovary become a corpus luteum - a body with the primary function of producing large amounts of the hormone progesterone. (wikipedia.org)
• The corpus luteum, under the influence of luteinizing hormone which emanates from the anterior pituitary in the brain secretes progesterone. (berkleycenter.com)
• If pregnancy is not successful, the corpus luteum becomes atretic (dies) and progesterone levels diminish and menstruation starts. (berkleycenter.com)
• For most of the second half of the cycle, estrogens and progesterone are produced by the newly formed corpus luteum. (clinicalgate.com)
• At the end of the cycle, the corpus luteum atrophies, causing production of estrogens and progesterone to decline. (clinicalgate.com)
• After ovulation, the ruptured follicle becomes a corpus luteum and, under the influence of LH, begins to secrete progesterone. (clinicalgate.com)

Uterus3

• The uterine cycle governs the preparation and maintenance of the lining of the uterus (womb) to receive an embryo. (wikipedia.org)
• Each cycle occurs in phases based on events either in the ovary (ovarian cycle) or in the uterus (uterine cycle). (wikipedia.org)
• The corpus luteum prepares the uterus to receive a fertilized egg. (proprofs.com)

Follicle2

• This follicle is now known as the 'yellow body' or corpus lutuem. (berkleycenter.com)
• The granulosa cells and theca cells of the developing antral follicle and the steroidogenic cells of the corpus luteum produce and respond to angiogenic factors and vasoactive peptides. (biomedcentral.com)

Placenta4

• The HCG causes the corpus luteum to continue to secrete P (this is called corpus luteum- rescue), until the placenta is fully formed at which point the placenta itself secretes appropriate amounts of P to help maintain pregnancy. (berkleycenter.com)
• After 6 or 7 weeks the placenta is formed and it secretes P. The corpus luteum is no longer necessary. (berkleycenter.com)
• By continuing to use abdominal acupuncture, we continue to gently stimulate blood flow to the placenta (reducing the effects of poor hemodynamics which can occur due to thrombophilic disorder or just poor circulation), maintaining its ability to secrete P, estrogen, human placental-lactogen, relaxin and other hormones necessary for the maintenance of a healthy pregnancy. (berkleycenter.com)
• The fetus also has a unique hormonal system that combines not only its own developing endocrine system, but also that of the corpus luteum, placenta and maternal hormones. (edu.au)

Ovulation1

• Following ovulation the neovascularization during the early stages of corpus luteum development has been compared to the rapid angiogenesis observed during tumor formation. (biomedcentral.com)

Ovary1

• The potential clinical applications of research directed on corpus luteum endothelial cells are intriguing considering reproductive processes in which vascular dysfunctions may play a role such as ovarian failure, polycystic ovary syndrome (PCOS), and ovarian hyperstimulation syndrome (OHSS). (biomedcentral.com)

Ovarian2

• The ovarian cycle consists of alternating follicular and luteal phases, and the uterine cycle consists of menstruation, the proliferative phase, and the secretory phase. (wikipedia.org)
• At midcycle, one of the ovarian follicles ruptures and then evolves into a corpus luteum. (clinicalgate.com)

Endometrium1

• Myomas, uterine septa, and endometritis are responsible for poor secretory changes in the endometrium. (medscape.com)

Pregnancy3

• If pregnancy does not occur, menses begins with the demise of the corpus luteum. (medscape.com)
• Reproductive hormones, also known as sex hormones, are steroid hormones that play important roles in the development and maintenance of sexual characteristics, fertility, pregnancy, and menstruation. (hellovaia.com)
• The regulation of endothelial cell proliferation in the corpus luteum of pregnancy is less clear. (biomedcentral.com)

Proliferative1

• the uterine cycle consists of the menstrual, proliferative and secretory phases. (wikipedia.org)

Estrogen1

• Stimulated by gradually increasing amounts of estrogen in the follicular phase, discharges of blood flow stop and the uterine lining thickens. (wikipedia.org)

Occur1

• and (4) if fertilization does not occur, the corpus luteum atrophies. (clinicalgate.com)

Function3

• The contributions of vasoactive peptides generated by the luteal endothelin-1 and the renin-angiotensin systems are discussed in context with the function of endothelial cells during corpus luteum formation and regression. (biomedcentral.com)
• New blood vessel growth is essential for the formation and function of the corpus luteum. (biomedcentral.com)
• The function of platelets in the maintenance of hemostasis has long been recognized and well defined. (biomedcentral.com)

Events2

• Analogous to events occurring in the corpus luteum, the vascular endothelium of other tissues responds to extracellular signals during the physiologic processes of embryonic development and wound healing, and in the pathologic process of tumor angiogenesis. (biomedcentral.com)
• In males, the establishment of internal reproductive system involves two key events: the formation of the testis and the maintenance and differentiation of the WD. (esur2023.com)

Development1

• This review is designed to provide an overview of the types of endothelial cells present in the corpus luteum and their involvement in corpus luteum development and regression. (biomedcentral.com)

Important1

• The platelet-activating factor (PAF) is also an important secretory product of platelets mediating the platelet aggregation, inflammation and anaphylaxis[ 13 ] (Table 1 ). (biomedcentral.com)

Cycles1

• Both cycles can be divided into phases. (wikipedia.org)

Present1

• It is always present during the acute phase of the infection and in the chronic carrier phase. (spiritsong.org)

Luteal2

• The patient may report menstrual cycles of less than 26 days or a luteal phase of less than 11 days by basal body temperatures. (medscape.com)
• The following mechanisms can cause an inadequate endometrial response to hormonal stimulation during the luteal phase. (medscape.com)

Granulosa1

• Therefore, MTOR-dependent pathways in primordial or growing oocytes differentially affected downstream processes including follicular development, sex-specific identity of early granulosa cells, maintenance of oocyte genome integrity, oocyte gene expression, meiosis, and preimplantation developmental competence. (edu.au)

Uterine1

• the uterine cycle consists of the menstrual, proliferative and secretory phases. (wikipedia.org)

Primary1

• The primary effect of PRL is the initiation and maintenance of lactation in the postpartum period. (oncohemakey.com)