Abnormality of structure, function or body metabolism (inborn error of body chemistry) present at birth that results in physical and/or mental disability, or is fatal.
An abnormality in a baby caused by an error during fetal development. Birth defects may or may not be genetic.
When a baby is born with a physical or mental abnormality that developed while in the womb. Women undergoing certain breast cancer treatments should not become pregnant because of the risk of birth defects.