Risk Factors - Congenital Heart Defects - Risk Factors

Congenital heart defects are the most common type of birth defect, occurring in about one percent of live births in the United States. If your child has a congenital heart defect, you may think you did something wrong during your pregnancy to cause the problem.

However, doctors often do not know why congenital heart defects occur. Researchers do know that the risk of having a baby with a congenital heart defect is influenced by family history and genetics, the mother’s health, sex, and exposure during pregnancy to environmental factors, such as smoke or certain medicines. Other medical conditions can also raise your risk for having a baby with a congenital heart defect.