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?
All babies in the U.S. receive newborn screening tests before leaving the hospital to test for possible health concerns. See which tests your baby may receive.
Phenylketonuria (PKU) is a condition where your body can't break down an amino acid called phenylalanine. Learn to recognize PKU symptoms and treatments.