Maintenance of pregnancy in spayed rats with 20a-hydroxypregn-4-ene-3-one and 20-beta-hydroxypregn-4-ene-3-one.
D000818:Animals; D002369:Castration; D004958:Estradiol; D005260:Female; D008297:Male; D011247:Pregnancy; D011270:Pregnancy, Animal; D011372:Progestins / Q000494:pharmacology*; D051381:Rats
D011372:Progestins; D004958:Estradiol