Corpus Luteum

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Related to luteal: short luteal phase, Luteal cells

corpus luteum

[′kȯr·pəs ′lüd·ē·əm]
The yellow endocrine body formed in the ovary at the site of a ruptured Graafian follicle.

Corpus Luteum


in mammals and man, an endocrine gland that develops in the ovary at the site of the graafian follicle after rupture of the follicle wall and discharge of the ovum (ovulation); it consists of altered follicular (so-called lutein) cells. If pregnancy does not follow ovulation, the corpus luteum degenerates within one or two weeks (periodic, or menstrual, corpus luteum); if, however, the ovum is fertilized and pregnancy begins, the corpus luteum grows very rapidly (corpus luteum of pregnancy) and is retained throughout the greater part of pregnancy, secreting the hormone progesterone, which is necessary for the maintenance and development of the pregnancy.

The term “corpus luteum” is sometimes applied to the aggregate of follicular cells formed in the ovary at the site of discharge of the mature ovum in some invertebrates (insects) and in the majority of vertebrates (amphibians, reptiles, and birds).

References in periodicals archive ?
During the year-long study, they identified 28 women who had more than one menstrual cycle with a short luteal phase -- the interval between ovulation and the beginning of menstruation -- and andther 13 women who failed to ovulate during at least one cycle.
O-14] Impact of Luteal Supplementation with a Weekly Progesterone Vaginal Ring During In Vitro Fertilization (IVF) by Day of Embryo Transfer (ET) (Oral Session: Clinical Female Infertility and Gynecology: Monday, October 22, 2012: 6:00 - 6:15 p.
Despite GnRH antagonist administration in the late luteal phase and menstrual bleeding, FSH was not sufficiently reduced to secure a more synchronic cohort of recruitable follicles (51).
Luteal phase (Days 14-28): 20:40:40 or 10:45:45 macronutrient intake (carbs:protein:fat).
In the multicenter, randomized, open-label exploratory study, patients were randomized prior to stimulation with either MENOPUR (menotropins for injection, USP) or rFSH and luteal support with either ENDOMETRIN (n=84) or PIO (n=81) for nine days.
There were significant differences in concentrations for the HP goats between days 4 and 12 in the luteal phases (1.
Of the 129 women who were in the luteal phase of their menstrual cycle at blood draw, 87 (67%) were classified as having ovulated (> 3 ng/mL progesterone).
Women get a lot less euphoria, especially during the luteal phase," he said at the meeting cosponsored by the New York Academy of Medicine.
These data indicate that the rate of luteal endothelial cell and pericyte proliferation was greatest earl), in the estrous cycle then decreased throughout the estrous cycle in a pattern similar to that of overall luteal cellular proliferation.
Single luteal phase serum progesterone assay as an indicator of ovulation.
During the luteal phase, the investigators discovered significantly lower zinc levels in blood from women with PMS than in the control samples.
However, a few studies observed an increased incidence of luteal phase bleeding in patients supplemented with Crinone.