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Prenatal Genetic Screen, Part 2

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About Our Prenatal Genetic Screen, Part 2

Note: Fasting is not required for this test.

This blood test screens for open neural tube defects, Down syndrome (Trisomy 21), and Trisomy 18.

Sequential screening requires two specimens-- one collected in the first trimester and one in the second trimester. This test (Part 2) is for the second trimester portion of the test.


Neural tube defects are birth defects of the brain, spine, or spinal cord.

Down syndrome is a genetic chromosome 21 disorder causing developmental and intellectual delays.

Trisomy 18 is a condition that causes severe developmental delays due to an extra chromosome 18.


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