title: Melatonin injection into Syrian hamsters.
mesh_terms: D000818:Animals; D002940:Circadian Rhythm; D006224:Cricetinae; D004780:Environment, Controlled; D004971:Estrus; D005260:Female; D008027:Light; D008297:Male; D008550:Melatonin / Q000097:blood / Q000494:pharmacology*; D009929:Organ Size / Q000187:drug effects; D011247:Pregnancy; D013737:Testis / Q000187:drug effects; D014599:Uterus / Q000187:drug effects
chemical_list: D008550:Melatonin