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These prenatal tests, when they warn of rare disorders, are usually wrong

As prenatal tests have expanded to more rare conditions, a larger share of their positive results are incorrect, an examination by The New York Times has found. ....

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These Prenatal Tests Are Usually Wrong When Warning of Rare Disorders

The false positives aren’t mentioned in the brochures for these blood screenings, which are sold by some of the biggest labs in the country. ....

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