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.
Pregnancy after age 35 If you get pregnant after 35, you may need prenatal tests to check for birth defects. Learn about pregnancy after 35.
Zika virus and pregnancy infographic Zika infection during pregnancy causes a birth defect called microcephaly and other brain problems. Learn how to protect yourself from Zika.