Increased Prevalence of Congenital Heart Defects in Monozygotic and Dizygotic Twins

Abstract excerpt

BACKGROUND: Smaller studies and many case series reports indicate that congenital heart defects may be more common in monochorionic twins than in dichorionic twins and singletons. METHODS AND RESULTS: We investigated congenital heart defect occurrence in all twins and 5% of all singletons born in Denmark in 1977-2001 and followed through 2006 by linking the Danish Twin Registry and Statistics Denmark registers...

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