What Are the Causes of Congenital Heart Disease?


What causes congenital heart disease?


Doctors don’t always know the reason why a baby has congenital heart defect. Congenital heart disease occurs as a result of an early development problem in the heart’s structure. The suspected causes include the following:

  • The heart defect may run in families
  • Taking certain prescription drugs during pregnancy puts a child at a higher risk for a heart defect.
  • Using alcohol or illegal drugs during pregnancy can increase a child’s risk of having a heart defect.
  • Mothers who had a viral infection during the first trimester of pregnancy are more likely to give birth to a child with a heart defect.
  • Increased blood sugar levels, such as occurs with diabetes, may affect childhood development.


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* The Content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.