Marfan syndrome Marfan syndrome is a birth defect that affects the body's connective tissue. Learn the signs and symptoms of Marfan syndrome and how it's treated.
Congenital Zika syndrome Congenital Zika syndrome is a group of conditions caused by Zika infection during pregnancy. Learn about the medical care babies with this syndrome may need.
Preexisting diabetes If you're pregnant and have preexisting diabetes, you and your baby may face some health concerns. Learn how diabetes affects your pregnancy.