Vasa previa.
D000328:Adult; D005260:Female; D005313:Fetal Death / Q000517:prevention & control; D005332:Fetoscopy; D006470:Hemorrhage / Q000209:etiology; D006801:Humans; D011247:Pregnancy; D011248:Pregnancy Complications; D011296:Prenatal Diagnosis; D014469:Umbilical Arteries / Q000002:abnormalities*; D014471:Umbilical Veins / Q000002:abnormalities*