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 ?
LONERGAN, P Effects of human chorionic gonadotrophin administration on Day 5 after oestrus on corpus luteum characteristics, circulating progesterone and conceptus elongation in cattle.
However, if the corpus luteum is ruptured iatrogenically by the laparoscope the luteal phase will be shortened (Nigi, 1977).
Extension of corpus luteum lifespan and reduction of uterine secretion of prostaglandin F2 alpha of cows in response to recombinant interferontau.
Functional morphology and regulation of corpus luteum.
Similarly, we observed caspase-3 immunoreactivity more frequently in the granulosa cells of the degenerating (atretic) follicles (Figure 2C, b-c) and in the luteal cells of the corpus luteum (Figure 2C, f-g) in ovaries of the BPA-treated groups compared with controls (Figure 2C, a-e).
Grace and colleagues (1982) in a study to reduce the number of secondary follicles and increases the number of follicle atresia were reported in diabetic, Significant differences between the control group and the diabetic soon saw the number of corpus luteum in the ovary [12].
The corpus luteum is a temporary endocrine gland that develops during the luteal phase of a woman's menstrual cycle.
In early pregnancy, progesterone is produced first by the corpus luteum, then by the placenta.
The main secretion of the corpus luteum is P, which stimulates the secretion of uterine glands and prepares the inner lining of the uterus, the endometrium, for pregnancy.
The function of corpus luteum (CL) formed in the ovary following ovulation is a temporary endocrine gland, and contributes to the regulation of estrus/menstrual cycle and the successful maintenance of pregnancy (Axelson et al.