title: The interaction of photoperiod and testosterone on the development of copulatory behavior in castrated male hamsters.
mesh_terms: D000728:Androgens / Q000097:blood; D000818:Animals; D002369:Castration; D003307:Copulation / Q000502:physiology*; D006224:Cricetinae; D004343:Drug Implants; D004542:Ejaculation / Q000187:drug effects; D008027:Light; D008297:Male; D008647:Mesocricetus; D013739:Testosterone / Q000494:pharmacology*; D013997:Time Factors
chemical_list: D000728:Androgens; D004343:Drug Implants; D013739:Testosterone