Prolonged exposure of castrated male hamsters to a nonstimulatory photoperiod: spontaneous change in sensitivity of the hypothalamic-pituitary axis to testosterone feedback.
D000818:Animals; D002369:Castration; D006224:Cricetinae; D003624:Darkness; D004343:Drug Implants; D005246:Feedback; D005640:Follicle Stimulating Hormone / Q000097:blood; D007030:Hypothalamo-Hypophyseal System / Q000187:drug effects / Q000502:physiology*; D007700:Kinetics; D008027:Light; D008297:Male; D008647:Mesocricetus; D013737:Testis / Q000502:physiology; D013739:Testosterone / Q000494:pharmacology*
D004343:Drug Implants; D013739:Testosterone; D005640:Follicle Stimulating Hormone