congenital defect

Main Entry: birth defect
Function: noun
: a physical or biochemical defect (as cleft palate, phenylketonuria, or Down syndrome) that is present at birth and may beinherited or environmentally induced

birth defect n.
A physiological or structural abnormality that develops at or before birth and is present at the time of birth, especially as a result of faulty development, infection, heredity, or injury. Also called congenital anomaly.