Can smoking while pregnant contribute to congenital heart defects and heart failure in my child?

Yes: An association between smoking during pregnancy and congenital heart defects has been demonstrated. This is one the many problems that can occur due to smoking during pregnancy. Smoking while pregnant also increases the risk for preterm birth, low birth weight, asthma, sudden infant death syndrome and other health issues.

It can: Children of women who smoked during pregnancy have approximately 2.5 times higher rate of congenital heart defects, some of which can result in heart failure. To put this in context, however, means that about 1 child in 200 gets congenital heart problems in non-smokers, and 2-3 children out of 200 get it with smoking mothers. So, its not common in either, but its just 1 of many risks of ur smoking.