Effect of Reduced Luteinizing Hormone Concentrations on Corpus Luteum Function during the Menstrual Cycle of Rhesus Monkeys*

Endocrinology ◽  
1990 ◽  
Vol 126 (5) ◽  
pp. 2237-2244 ◽  
Author(s):  
ANTHONY J. ZELEZNIK ◽  
LYNDA L. LITTLE-IHRIG
Author(s):  
Naseema Gangat

The menstrual cycle is composed of the follicular (proliferative), periovulatory, and luteal (secretory) phases. At periovulation, the mature follicle triggers a surge in luteinizing hormone level, causing ovum release and stimulating the residual ovarian follicle to transform into a corpus luteum. Circulating estrogen and progestin levels increase. A thickened, enriched endometrium develops owing to progestin secretion from the corpus luteum. Without fertilization, the corpus luteum atrophies, estrogen and progestin levels decline, follicle-stimulating hormone release is stimulated, and the endometrium sloughs.


Endocrinology ◽  
1986 ◽  
Vol 119 (5) ◽  
pp. 1964-1971 ◽  
Author(s):  
JAMES S. HUTCHISON ◽  
PAUL B. NELSON ◽  
ANTHONY J. ZELEZNIK

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