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What is the quad marker screen?

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The quad marker screen is a blood test that predicts the likelihood that a woman is carrying a baby that has a birth defect. This means that for some women who have healthy babies, screening results will show a possible problem. And for some women, birth defects in their babies won’t be detected.

Since quad marker screen results can be uncertain, you can opt to not have the test. Talk to your doctor about the pros and cons of taking this test before you decide.

From: Pregnancy and the Quad Marker Screen WebMD Medical Reference

Reviewed by Trina Pagano on September 19, 2016

Medically Reviewed on 09/19/2016

SOURCES: The March of Dimes.  , "Second trimester maternal serum screening for fetal open neural tube defects and aneuploidy." American College of Medical Genetics, 2004.


Deborah A. Driscoll, MD

Reviewed by Trina Pagano on September 19, 2016

SOURCES: The March of Dimes.  , "Second trimester maternal serum screening for fetal open neural tube defects and aneuploidy." American College of Medical Genetics, 2004.


Deborah A. Driscoll, MD

Reviewed by Trina Pagano on September 19, 2016

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