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The most common form of birth defects are congenital heart defects. This article describes the causes, symptoms, and treatments of congenital heart defects. Cleft Lip and Cleft Palate. The 4th most common birth defect is a cleft lip or palate.
Ventricular septal defects are the second most common defect. Ventricular septal defect occurs in about 25% of all infants born with a heart defect. These defects are more common in premature infants. Treatment for ventricular septal defect include reduce symptoms with medications, antibiotics, or surgery.