The validity of real time scanning in detection of the cervical incompetence.
D002584:Cervix Uteri / Q000601:surgery; D005260:Female; D006801:Humans; D011247:Pregnancy; D012189:Retrospective Studies; D014463:Ultrasonography / Q000379:methods; D002581:Uterine Cervical Incompetence / Q000175:diagnosis* / Q000601:surgery