Effect of Exogenous Estrogens on Corpus Luteum Maintenance in Gilts

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Abstract
Stilbestrol, estradiol-17-β and estrone maintained functional corpora lutea in gilts when treatment was started by day 11 of the estrous cycle. Estrogen treatment resulted in a decrease (P<.01) in corpus luteum weight, and an increase (P<.01) in progesterone concentration without altering the total progesterone content of the corpora lutea. Estrone maintained significantly greater size of corpora than did estradiol-17-β. Copyright © 1963. American Society of Animal Science. Copyright 1963 by American Society of Animal Science