title: Dependence of preovulatory progesterone on critical period in the cyclic hamster.
mesh_terms: D000818:Animals; D006224:Cricetinae; D004958:Estradiol / Q000494:pharmacology; D004971:Estrus; D005260:Female; D005640:Follicle Stimulating Hormone / Q000494:pharmacology; D006062:Gonadotropins / Q000378:metabolism*; D007986:Luteinizing Hormone / Q000494:pharmacology; D009929:Organ Size; D010060:Ovulation; D010634:Phenobarbital / Q000494:pharmacology; D011247:Pregnancy; D011374:Progesterone / Q000378:metabolism*; D012726:Sexual Behavior, Animal / Q000187:drug effects*; D013997:Time Factors; D014599:Uterus / Q000187:drug effects
chemical_list: D006062:Gonadotropins; D011374:Progesterone; D004958:Estradiol; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone; D010634:Phenobarbital