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Step 2. Select tests/measurements:

Use the checkboxes to select some or all of the tests/measurements listed to the right.

Most newborn screening tests are done with a blood sample taken 24 to 48 hours after a baby is born. The tests then measure the amounts of chemicals (known as analytes).

MS/MS refers to tests that are analyzed using a technique called tandem mass spectrometry. Non-MS/MS analyses use other techniques.

The hearing test uses a soft earphone or other instrument that is placed in the baby's ear.

Step 3. Include or exclude derived measures:

Some of the markers listed in these tables are direct measures of a particular chemical substance and some are derived as sums and/or ratios from two or more direct measures.