The biphasic effect of progesterone on ovulation in the rat.
D000818:Animals; D002940:Circadian Rhythm; D004971:Estrus; D005260:Female; D010060:Ovulation / Q000187:drug effects*; D010424:Pentobarbital / Q000494:pharmacology; D011247:Pregnancy; D011374:Progesterone / Q000494:pharmacology*; D051381:Rats
D011374:Progesterone; D010424:Pentobarbital