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February 10, 2012

Quad Marker Screen Test Index

Featured: Quad Marker Screen Test Main Article

The quad marker screen determines if a woman is at higher or lower risk of carrying a baby with a birth defect. This test may only be administered between 15 and 20 weeks of pregnancy. A quad marker screen tests for the presence of alpha-fetoprotein, unconjugated estriol, human chorionic gonadotropin, and inhibin-A. If the results of the quad marker screen test are abnormal, further tests may be necessary.

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