Corpus Luteum


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Related to Corpus Luteum: progesterone, menstrual cycle, corpus luteum cyst

corpus luteum

[′kȯr·pəs ′lüd·ē·əm]
(histology)
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 ?
In conclusion, although extremely rare, rupture of corpus luteum in early pregnancy with hemoperitoneum can cause acute abdomen that mimics rupture of ectopic pregnancy.
Telleria, "Luteal 3beta- hydroxysteroid dehydrogenase and 20alpha-hydroxysteroid dehydrogenase activities in the rat corpus luteum of pseudopregnancy: effect of the deciduoma reaction," Reproductive Biology and Endocrinology, vol.
Ggt1-null mice demonstrated growth retardation and a severe female reproductive phenotype, which included no large antral follicles or corpus luteum in the ovaries and a lack of response of the follicles to exogenous gonadotropin stimulation.
With the decrease in the level of progesterone immediately after medical abortion, the hormonal control mechanism of the progesterone might have shifted and caused an abrupt increase in the production of the hormone at the corpus luteum and adrenal cortex, causing APD.
Effect of hCG administration during corpus luteum establishment on subsequent corpus luteum development and circulating progesterone concentrations in beef heifers.
According to the macroscopically normal Fallopian tubes, the absence of extensive pelvic adhesions and the presence of the corpus luteum on the right ovary, it seemed likely that after the fertilization, which could have occurred in the pouch of Douglas, the zygote was carried by intraperitoneal fluid and implanted into the vesicouterine pouch.
Transfer was performed on the 7th day of the sexual cycle depending on availability of an active corpus luteum of the 2nd and 3rd quality.
Comparison of tubal ring and corpus luteum echogenicities: a useful differentiating characteristic.
Nature of the tumor Frequency Mean age in Laparoscopy years alone Teratoma 28.8% 28.9 43.0% Endometrioma 24.2% 30.4 53.0% Serous cyst 14.1% 36.3 60.8% corpus luteum [+ or -] rupture 8.0% 31.7 47.1% Follicular, Mullerian 8.6% 36.0 39.0% & Para tubal Mucinous 2.5% 33.0 20.0% Hydrosalpinx 3.1% 38.0 17.0% others 10.6% 34.1 39.0% Nature of the tumor Laparotomy Laparoscopy converted alone to laparotomy Teratoma 43.6% 13.4% Endometrioma 32.0% 15.0% Serous cyst 35.7% 3.5% corpus luteum [+ or -] rupture 41.2% 11.7% Follicular, Mullerian 50.0% 11.0% & Para tubal Mucinous 80.0% -- Hydrosalpinx 83.0% -- others 50.0% 11.0% Table 2: Distribution of parity.