Use of some progestational 19-nor steroids in gynecology.
D003270:Contraceptive Agents; D006176:Gynecology / Q000628:therapy*; D011374:Progesterone / Q000031:analogs & derivatives; D013256:Steroids
D003270:Contraceptive Agents; D013256:Steroids; D011374:Progesterone
CONTRACEPTIVES; GYNECOLOGY/therapy; PROGESTERONE/related compounds