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Journal of Clinical Endocrinology & Metabolism, Vol 41, 41-43, Copyright © 1975 by Endocrine Society

ARTICLES

The role of estrogen in the modulation of pituitary sensitivity of LRF (luteinizing hormone-releasing factor) in men

CF Wang, BL Lasley and SS Yen

The role of estradiol in modulating pituitary gonadotropin release in the human male was studied by evaluating the effects of clomiphene on the pituitary gonadotropin response to synthetic LRF (150 mug) in 6 eugonadal men. Administration of clomiphene (100 mg single daily dose time 5 days) induced a significant elevation of the basal levels of LH, FSH, estradiol and testosterone. However, the pituitary release of LH and FSH in response to LRF was markedly diminished by the clomiphene treatment. This finding suggests that in men, as in women, endogenous estradiol provides feedback regulation of gonadotropin output by the pituitary.




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Copyright © 1975 by The Endocrine Society