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 ?
In fact, previous reports have shown that a LHR desensitization of luteal cells upon ligand-binding results in a decline in steady state levels of LHR mRNA [46, 47].
Effect of selenium on cultured bovine luteal cells. Anim Reprod Sci 1997;46:203-11.
Pate, "Mechanisms of cytokine-induced death of cultured bovine luteal cells, " Reproduction, vol.
Steroidogenic capacity and oxidative stress--related parameters in human luteal cell regression.
Pate JL, Codon WL (1982) Effects of serum and lipoproteins on steroidogenesis in cultured bovine luteal cells. Mol.
Effects of growth hormone, prolactin, insulin--like growth factors, and gonadotropins on progesterone secretion by porcine luteal cells. J.
Within a week or so, the luteal cells stop making progesterone and die.
The results of the current experiments demonstrate substantially increased esrrb3 mRNA expression at 72 h of IVC, which is related to luteal cell transformation of GCs.
Differential cellular localization of galectin-1 and galectin-3 in the regressing corpus luteum of mice and their possible contribution to luteal cell elimination.
Immunolocalization of both LEP and LEPR in steroidogenic and endothelial luteal cells invites us to consider the putative effect of LEP system on local steroidogenesis and angiogenesis modulation.
Forty-eight hours later, the latter group of animals were either sacrificed (eCG group; ovaries enriched in antral follicle-differentiated GCs) or administered hCG (15 IU; i.p.) and sacrificed eight hours, thereafter (hCG group; ovaries enriched in luteal cells).
Changes in luteal cells distribution, apoptotic rate, lipid peroxidation levels and antioxidant enzyme activities in buffalo (Bubalus bubalis) corpus luteum.