Testicular metabolism and serum testosterone in aging male rats.
D000375:Aging; D000818:Animals; D006063:Chorionic Gonadotropin / Q000494:pharmacology; D002940:Circadian Rhythm; D008297:Male; D011374:Progesterone / Q000378:metabolism; D051381:Rats; D013737:Testis / Q000187:drug effects / Q000378:metabolism*; D013739:Testosterone / Q000097:blood*
D006063:Chorionic Gonadotropin; D013739:Testosterone; D011374:Progesterone