title: [A comparative study on the antifertility action of levonorgestrel oxime and levonorgestrel].
mesh_terms: D000818:Animals; D003271:Contraceptive Agents, Female / Q000494:pharmacology*; D003281:Contraceptives, Postcoital / Q000494:pharmacology*; D003282:Contraceptives, Postcoital, Hormonal / Q000494:pharmacology*; D004338:Drug Combinations; D010064:Embryo Implantation / Q000187:drug effects*; D004717:Endometrium / Q000187:drug effects; D005260:Female; D016912:Levonorgestrel; D009644:Norgestrel / Q000031:analogs & derivatives* / Q000494:pharmacology*; D010091:Oximes; D011247:Pregnancy; D051381:Rats; D011919:Rats, Inbred Strains; D013237:Stereoisomerism
chemical_list: D003271:Contraceptive Agents, Female; D003281:Contraceptives, Postcoital; D003282:Contraceptives, Postcoital, Hormonal; D004338:Drug Combinations; D010091:Oximes; D009644:Norgestrel; D016912:Levonorgestrel; C449219:norelgestromin