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A '''birth defect''' is a structural, functional, or metabolic abnormality present at birth that results in physical or mental disability or death. There are more than 4,000 known birth defects, which may be caused by [[gene]]tic or [[environment]]al factors. In the [[United States], about 150,000 babies are born each year with birth defects.
A '''birth defect''' is a structural, functional, or metabolic abnormality present at birth that results in physical or mental disability or death. There are more than 4,000 known birth defects, which may be caused by [[gene]]tic or [[environment]]al factors. In the [[United States]], about 150,000 babies are born each year with birth defects.
Some birth defects can be corrected by surgery after birth. Some examples are cleft palate, extra fingers or toes, webbed feet, club foot and 'hole in the heart'.
Some birth defects can be corrected by surgery after birth. Some examples are cleft palate, extra fingers or toes, webbed feet, club foot and 'hole in the heart'.