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.
Rh disease RH factor is a protein on some people's red blood cells. Learn how RH disease affects your baby and how to prevent it.
Influenza (flu) and pregnancy Get the flu shot during pregnancy. It helps protect you and your baby from serious health problems. Learn the signs and symptoms of flu.