Contraceptive effect of varying dosages of progestogen in silastic vaginal rings.
D000085:Acetates / Q000494:pharmacology; D003270:Contraceptive Agents / Q000494:pharmacology*; D003404:Creatinine / Q000652:urine; D005260:Female; D006801:Humans; D007434:Intrauterine Devices; D008525:Medroxyprogesterone / Q000008:administration & dosage / Q000494:pharmacology*; D008598:Menstruation; D011108:Polymers; D011276:Pregnanediol / Q000652:urine; D012828:Silicones; D013375:Substance Withdrawal Syndrome; D014592:Uterine Hemorrhage / Q000209:etiology
D000085:Acetates; D003270:Contraceptive Agents; D011108:Polymers; D012828:Silicones; D003404:Creatinine; D008525:Medroxyprogesterone; D011276:Pregnanediol