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Maternal Serum Alpha-fetoprotein (MSAFP)
Maternal Serum Alpha-fetoprotein (MSAFP) is a test for genetic abnormalities performed between 15 and 20 weeks gestation.
Increased MSAFP is suggestive of neural tube defects.
Decreased MSAFP is suggestive of Down syndrome. Abnormal results should be followed by an amniocentesis to confirm.
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