title: 3-keto-delta-4 steroid: requirement for ovulation in Rana pipiens.
mesh_terms: D000731:Androstanes / Q000494:pharmacology*; D000818:Animals; D001001:Anura / Q000502:physiology*; D005260:Female; D006065:Gonadotropins, Pituitary / Q000494:pharmacology; D006913:Hydroxysteroid Dehydrogenases / Q000037:antagonists & inhibitors*; D007664:Ketosteroids / Q000494:pharmacology; D009570:Nitriles / Q000494:pharmacology*; D010053:Ovary / Q000378:metabolism; D010060:Ovulation / Q000187:drug effects*; D011284:Pregnenolone / Q000494:pharmacology; D011374:Progesterone / Q000494:pharmacology; D013256:Steroids / Q000502:physiology*; D013268:Stimulation, Chemical
chemical_list: D000731:Androstanes; D006065:Gonadotropins, Pituitary; D007664:Ketosteroids; D009570:Nitriles; D013256:Steroids; D011374:Progesterone; D011284:Pregnenolone; D006913:Hydroxysteroid Dehydrogenases