title: Diagnosis of an incompetent internal cervical os.
mesh_terms: D000293:Adolescent; D000328:Adult; D003287:Contrast Media; D005260:Female; D006176:Gynecology / Q000295:instrumentation; D006801:Humans; D008722:Methods; D011247:Pregnancy; D011248:Pregnancy Complications / Q000601:surgery; D011859:Radiography; D002581:Uterine Cervical Incompetence / Q000000981:diagnostic imaging*
chemical_list: D003287:Contrast Media