Cervical incompetence in multiple pregnancy.
D000033:Abortion, Threatened / Q000628:therapy*; D000328:Adult; D003475:Curettage; D004106:Dilatation; D005260:Female; D006801:Humans; D011247:Pregnancy; D011272:Pregnancy, Multiple; D013537:Sutures; D014427:Twins; D014593:Uterine Inertia / Q000601:surgery*