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By Mayo Clinic staffIn most cases, truncus arteriosus can't be prevented. If you have a family history of heart defects or if you already have a child with a congenital heart defect, you and your partner may consider talking with a genetic counselor and a cardiologist experienced in congenital heart defects before you make a decision about becoming pregnant.
It's best not to drink alcohol during pregnancy. If you're concerned because you drank alcohol before you knew you were pregnant or you think you need help to stop drinking, talk with your health care provider.
If you're a woman with diabetes, talk to your doctor about pregnancy risks associated with diabetes and how best to manage the disease during your pregnancy.