Genetic and chromosomal conditions Genes and chromosomes can sometimes change, causing serious health conditions and birth defects for your baby. Learn about these changes and testing for them.
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.
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.