Fetal DNA tests prove highly accurate but experts warn of exceptions

April 2, 2015 12:15 AM

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CHICAGO (Reuters) - A Roche blood test to screen fetuses for Down syndrome worked far better than standard prenatal screening tests in younger, low-risk women, U.S. researchers said on Wednesday, setting the stage for more widespread use.

The new study, published in the New England Journal of Medicine, is the largest to show the tests are accurate in even low-risk women. But experts warned that women who test positive still need to confirm the result through more invasive diagnostic testing such as amniocentesis, especially if they w...

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