Estrogen and testosterone sensitivity of middle-aged female rats in the regulation of LH.
D000375:Aging; D000818:Animals; D002369:Castration; D004343:Drug Implants; D004958:Estradiol / Q000494:pharmacology*; D004971:Estrus; D005246:Feedback; D005260:Female; D007700:Kinetics; D007986:Luteinizing Hormone / Q000097:blood*; D011247:Pregnancy; D051381:Rats; D013739:Testosterone / Q000494:pharmacology*
D004343:Drug Implants; D013739:Testosterone; D004958:Estradiol; D007986:Luteinizing Hormone