Monoamniotic twin pregnancy: a review of the world literature and a report of two new cases.
D009008:Abnormalities, Severe Teratoid / Q000209:etiology; D000328:Adult; D000650:Amnion; D005260:Female; D005313:Fetal Death / Q000209:etiology; D006801:Humans; D007231:Infant, Newborn; D011247:Pregnancy; D013223:Statistics as Topic; D014427:Twins; D014470:Umbilical Cord