Birth defects can cause problems in overall health, how the body develops or how the body works. Babies with birth defects may need special medical care.
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?
Phenylketonuria (PKU) is a condition where your body can't break down an amino acid called phenylalanine. Learn to recognize PKU symptoms and treatments.