Your chance of having a child with a congenital heart defect is higher if a close family member of yours had one (mom, dad, brother, sister). The chance of having a child with a heart defect based upon your family history is shown below.

Person with heart defect in your family Chances your child will have a heart defect
Brother or Sister 2-3%
Dad 2%
Mom 5-10%
  • Your risk is higher if more than one of your family members has a congenital heart defect
  • Some congenital heart defects are more likely to affect more than one family member
  • About 20% of heart defects can be linked to a known genetic cause