False Positives the Norm for Some Prenatal Screening Tests
KQED's Forum
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Prenatal Blood Test Genetic Testing - Is Mamograms a Bad Screening Tool?
Prenatal blood test screenings are not intended to be a hundred % accurate, but to flag potential issues for further follow up diagnostic testing. The screening tools we had in the past, which were usually a set of ultra sounds and blood draws, generated many more false positives. So really, these types of tests for down cendre have hugely reduced the amount of imbasive testing that have to happen for pregnant women.
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