Contraception by intrauterine release of steroids.
D003276:Contraceptives, Oral; D005260:Female; D006801:Humans; D007434:Intrauterine Devices; D007436:Intrauterine Devices, Medicated; D011374:Progesterone / Q000008:administration & dosage; D013997:Time Factors; D014599:Uterus / Q000187:drug effects / Q000502:physiology
D003276:Contraceptives, Oral; D011374:Progesterone