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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.
One anatomical malformation that may complicate the management of the pediatric airway is the cleft palate. The incidence of cleft palate, with or without cleft lip, is reported to be between 9.1 and 15.6 cases per 10,000 live births worldwide, which makes it one of the most common birth defects.