The accuracy of diagnosing placenta praevia with compound ultrasonic scanning.
D000773:Anesthesia, Obstetrical; D002585:Cesarean Section; D003951:Diagnostic Errors; D005260:Female; D006801:Humans; D010808:Physical Examination; D010923:Placenta Previa / Q000175:diagnosis*; D011247:Pregnancy; D013997:Time Factors; D014463:Ultrasonography; D014621:Vagina