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Cell-Free Fetal DNA Is Not Present in Plasma of Nonpregnant Mothers (Letters) (Letter to the Editor)
Clinical Chemistry 2004, March, 50, 3
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Publisher Description
To the Editor: Fetal DNA sequences are present in the plasma of pregnant women (1) and can be studied to determine fetal sex (1) and RhD type (2). Unlike fetal cells, fetal cell-free DNA is cleared rapidly from plasma after delivery (3), with a half-life of 16-28 min. Even when clearance is slowed, as in preeclampsia (4), the mean half-life for clearance of fetal DNA is 114 min (5).
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