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Shortly after birth, a blood sample is taken from a newborn to screen for diseases such as phenylketonuria (PKU) and congenital hypothyroidism. This type of testing is important, because treatment is available to improve the health of the child. Newborn screening is required in the United States, but states vary on which tests they offer.
Examples of tests used for newborn screening include:
Other tests, such as newborn hearing tests, can tell whether a baby may need future hearing services or genetic testing. Approximately 50% of cases of newborn hearing loss are caused by genetic factors.1
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