New progesteronic hormones in the control of fertility.
D003267:Contraception; D003270:Contraceptive Agents; D003276:Contraceptives, Oral / Q000628:therapy*; D005298:Fertility; D006728:Hormones; D006801:Humans; D011374:Progesterone / Q000031:analogs & derivatives
D003270:Contraceptive Agents; D003276:Contraceptives, Oral; D006728:Hormones; D011374:Progesterone
BIRTH CONTROL; CONTRACEPTIVES, ORAL/therapy; PROGESTERONE/related compounds