title: Effects of progesterone withdrawal and estrogen on maternal behavior in nulliparous rats.
mesh_terms: D000818:Animals; D002369:Castration; D004958:Estradiol / Q000494:pharmacology; D004967:Estrogens / Q000502:physiology*; D005260:Female; D008425:Maternal Behavior; D011374:Progesterone / Q000502:physiology*; D051381:Rats
chemical_list: D004967:Estrogens; D011374:Progesterone; D004958:Estradiol