title: Testicular involution in short photoperiods inhibited by melatonin.
mesh_terms: D000818:Animals; D001284:Atrophy; D006224:Cricetinae; D008027:Light; D008297:Male; D008550:Melatonin / Q000494:pharmacology*; D009929:Organ Size; D010507:Periodicity; D010870:Pineal Gland / Q000502:physiology; D013733:Testicular Diseases / Q000139:chemically induced; D013737:Testis / Q000187:drug effects*
chemical_list: D008550:Melatonin