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Effect of Exogenous Estrogens on Corpus Luteum Maintenance in Gilts¹

University of Wisconsin, Madison

Abstract

Stilbestrol, estradiol-17-ß 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-ß.

¹ Published with the approval of the Director of the Agricultural Experiment Station. Paper No. 886 from the Division of Genetics and No. 353 from the Department of Meat and Animal Science.

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