title: The holoacardius acephalus twin: prenatal diagnosis.
mesh_terms: D009008:Abnormalities, Severe Teratoid / Q000175:diagnosis*; D000328:Adult; D004200:Diseases in Twins; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D011247:Pregnancy; D011272:Pregnancy, Multiple; D011296:Prenatal Diagnosis; D014463:Ultrasonography