title: Failure of sex hormones and PMS to stimulate gonadal development in young Rana nigromaculata.
mesh_terms: D000818:Animals; D004958:Estradiol / Q000494:pharmacology*; D005260:Female; D006064:Gonadotropins, Equine / Q000494:pharmacology*; D006066:Gonads / Q000187:drug effects*; D008297:Male; D011898:Ranidae / Q000502:physiology*; D013739:Testosterone / Q000494:pharmacology*
chemical_list: D006064:Gonadotropins, Equine; D013739:Testosterone; D004958:Estradiol