<prompt> Infants of diabetic pregnancies may have hyperophic cardiomyopathy that occasionally progresses to congestive hea failure. Cardiomyopathy generally disappears by1 months of age3 months of age6 months of age12 months of age  <response>: Cardiac Hyperophy - Infants of diabetic pregnancies may have hyperophic cardiomyopathy that occasionally progresses to congestive hea failure. - These infants typically have macrosomia, and fetal hyperinsulinemia has been implicated in the pathogenesis of hea disease. - The cardiomyopathy generally disappears by 6 months of age. 