The newborn screening is a series of tests for certain genetic, metabolic, hemoglobin and endocrine disorders. Early detection is crucial in some cases. For example, the PKU test, which is one part of the screening, checks for Phenylketonuria. PKU is a metabolic issue that interferes with the infant's ability to process the amino acids that are necessary for digesting animal proteins and dairy products. In order for treatment to be most effective, dietary changes must be made prior to 3 months of age.

The blood samples needed for the newborn screening tests are usually obtained by pricking the baby's heel. Breastfeeding while the blood samples are being taken is very helpful for soothing and calming your baby.

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