Lack of clinical contraceptive efficacy of large doses of r 2323 given before implantation or after a missed period.
D000284:Administration, Oral; D003267:Contraception; D004341:Drug Evaluation; D010064:Embryo Implantation / Q000187:drug effects*; D047108:Embryonic Development; D004958:Estradiol / Q000097:blood; D005260:Female; D006801:Humans; D008598:Menstruation / Q000187:drug effects*; D009645:Norgestrienone / Q000008:administration & dosage / Q000031:analogs & derivatives; D009651:Norpregnatrienes / Q000494:pharmacology*; D011247:Pregnancy; D011374:Progesterone / Q000097:blood
D009651:Norpregnatrienes; D011374:Progesterone; D004958:Estradiol; D009645:Norgestrienone