Corpus Luteum

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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 ?
Statewide means ([+ or -] SD) of field-dressed body weight and number of corpora lutea of harvested female moose in 3 consecutive time periods in New Hampshire, 1988-2009.
At the time of embryos recovery presence of number of Corpora lutea in dairy animal are encourage able irrespective of poor quality embryo.
To determine the superovulatory response, the number of corpora lutea in the left and right ovaries and the number of total structures, unfertilized structures, degenerate embryos, and congealable embryos as a function of the rectal temperature were deployed in an orthogonal polynomial using SAS (2006) software.
Formation of corpora lutea and central luteal cavities and their relationship with plasma progesterone levels and other metabolic parameters in dairy cattle.
Ovary slides were examined for yolk deposition or corpora lutea.
When a doe mates with an infertile buck (or if its cervix is mechanically stimulated), ovulation is induced and corpora lutea will develop and produce progesterone for 13 days; that is, pseudopregnancy (Figure 10-5).
In addition, I also counted the number of eggs per ovariole and estimated the number of eggs laid and the number of eggs reabsorbed, by counting the number of corpora lutea and resorption bodies respectively.
Ovulation rates based on presence of corpora lutea were 88% and 50% for adults and yearlings, respectively; mean litter size was 3.