title: Sequential inhibitory effect of progesterone on lordotic responsiveness in rats: time course, estrogenic nullification, and actinomycin-D insensitivity.
mesh_terms: D000818:Animals; D003609:Dactinomycin / Q000494:pharmacology*; D004343:Drug Implants; D004958:Estradiol / Q000008:administration & dosage*; D005260:Female; D007700:Kinetics; D011187:Posture; D011374:Progesterone / Q000008:administration & dosage*; D051381:Rats; D012726:Sexual Behavior, Animal / Q000187:drug effects*
chemical_list: D004343:Drug Implants; D003609:Dactinomycin; D011374:Progesterone; D004958:Estradiol