title: The progesterone antagonist RU 486: a potential new contraceptive agent.
mesh_terms: D003271:Contraceptive Agents, Female / Q000494:pharmacology*; D010064:Embryo Implantation / Q000187:drug effects*; D004963:Estrenes / Q000494:pharmacology*; D005260:Female; D006801:Humans; D015735:Mifepristone
chemical_list: D003271:Contraceptive Agents, Female; D004963:Estrenes; D015735:Mifepristone