INCOMPETENT CERVIX.
D000033:Abortion, Threatened; D002584:Cervix Uteri; D005260:Female; D006801:Humans; D011247:Pregnancy; D013514:Surgical Procedures, Operative; D002581:Uterine Cervical Incompetence
ABORTION, THREATENED; CERVIX UTERI; PREGNANCY; SURGERY, OPERATIVE