Congenital heart defects and critical CHDs Congenital heart defects are the most common types of birth defects. Learn about newborn screening for heart defects and how to prevent them.
Down syndrome Down syndrome affects your baby's learning and development, and presents some physical problems. What causes Down syndrome and how can you test for it?
Smoking during pregnancy Smoking during pregnancy can cause problems like premature birth and birth defects. If you need help to quit smoking, tell your health care provider.