luteinization


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luteinization

 [loo″te-in″ĭ-za´shun]
the process taking place in the luteal cells of graafian follicles that have matured and discharged their eggs: the cells become hypertrophied and there is vascularization and lipid accumulation (the latter in some species giving a yellow color), the follicles then become corpora lutea.
Luteinization, beginning after rupture of the ovarian follicle in ovulation (A) and progressing through vascularization and hypertrophy of the maturing corpus (B, C); it is followed by regression (D) to the corpus albicans (E). From Dorland's, 2000.

lu·te·in·i·za·tion

(lū'tē-in-i-zā'shŭn),
Transformation of the mature ovarian follicle and its theca interna into a corpus luteum after ovulation; formation of luteal tissue, which appears yellow in some species.

luteinization

/lu·te·in·iza·tion/ (-in″ĭ-za´shun) the process by which a postovulatory ovarian follicle transforms into a corpus luteum through vascularization, follicular cell hypertrophy, and lipid accumulation, the latter in some species giving the yellow color indicated by the term.
Enlarge picture
Luteinization, beginning after rupture of the ovarian follicle in ovulation (A) and progressing through vascularization and hypertrophy of the maturing corpus luteum (B, C) ; it is followed by regression (D) to the corpus albicans (E) .

luteinization

[lo̅o̅′tē·in′īzā′shən]
Etymology: L, luteus, yellow
the formation of the corpus luteum from an ovarian follicle that has recently discharged an ovum. The process involves the hypertrophy of the follicular lutein cells and the development of blood vessels and connective tissue at the site.

lu·te·in·i·za·tion

(lū'tē-in-ī-zā'shŭn)
Transformation of the mature ovarian follicle and its theca interna into a corpus luteum after ovulation.

luteinization

the process taking place in the follicle cells of graafian follicles that have matured and discharged their egg: the cells become hypertrophied and there is vascularization and lipid accumulation (the latter in some species giving a yellow color), the follicles becoming corpora lutea.
References in periodicals archive ?
Premature luteinization during gonadotropin-releasing hormone antagonist cycles and its relationship with in vitro fertilization outcome.
Premature luteinization of follicles during ovarian stimulation for in-vitro fertilization.
Tissue specific promoter methylation and histone modification regulate CYP19 gene expression during folliculogenesis and luteinization in buffalo ovary, (Article in press).
There are striking similarities between CN and MEST in their clinical behavior, morphologic attributes of both the epithelial and stromal components, and immunohistochemical profiles although with variation in individual categories with higher prevalence of stromal to epithelial ratio, prominent ovarian stroma, smaller cysts with phyllodes glands pattern, and stromal luteinization being more prominent in MEST, and large cysts, thin septa, and low stromal to epithelial ratio in CN.
A cell adhesion receptor antiserum abolishes, whereas laminin and fibronectin glycoprotein components of extracellular matrix promote, luteinization of cultured rat granulosa cells.
2] Varying degrees of luteinization can appear in the stroma, with epithelioid cells staining positively with tyrosine hydroxylase and [Alpha]-inhibin antibodies.
In rabbits, lower doses of hCG trigger nuclear maturation, whereas luteinization requires higher doses and it is only with the highest doses of hCG that follicle rupture is induced (Bomsel-Helmreich et al.
However, as they explain, LH controls the secretion of sex hormones in both sexes and is essential for ovulation and luteinization (a key step in the ovulatory process).