Congenital anomalies in twins.
D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D000013:Congenital Abnormalities; D004200:Diseases in Twins; D005260:Female; D005333:Fetus; D006330:Heart Defects, Congenital; D006801:Humans; D006849:Hydrocephalus; D007231:Infant, Newborn; D009436:Neural Tube Defects; D010929:Placentation; D011247:Pregnancy; D014427:Twins; D014428:Twins, Conjoined; D014469:Umbilical Arteries / Q000002:abnormalities; D014564:Urogenital Abnormalities