title: The developmental pathogenesis of structural defects: the contribution of monozygotic twins.
mesh_terms: D000013:Congenital Abnormalities / Q000196:embryology* / Q000209:etiology; D004200:Diseases in Twins; D005260:Female; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D014427:Twins; D014430:Twins, Monozygotic