title: Acardiac twin. Report of Doppler sonography.
mesh_terms: D000328:Adult; D001775:Blood Circulation; D004200:Diseases in Twins; D005260:Female; D005315:Fetal Diseases / Q000503:physiopathology*; D006330:Heart Defects, Congenital / Q000196:embryology / Q000235:genetics*; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D011247:Pregnancy; D014427:Twins; D014430:Twins, Monozygotic; D014463:Ultrasonography; D014469:Umbilical Arteries / Q000503:physiopathology; D014471:Umbilical Veins / Q000503:physiopathology