A blood test: Nipt is a new technology which measures the amounts of fetal genetic material in the mother's blood. It is considered "noninvasive" because unlike traditional amniocentesis (amnio) it does not require inserting a needle into the womb to collect cells. Studies show that results may be just as good as an amnio, but it the test is still limited to select candidates and amnio is still the standard.
Answered 4/23/2014
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Fetal DNA: Testing for free fetal DNA is available for detection of trisomies either from 9 weeks 0 days or 10 weeks 0 days, the latter being much less expensive. The results are available in 7 to10days with 99.99% accuracy. Both ACMG and FACOG recommend confirmation of an abnormal result with either amniocentesis or CVS. other non-invasive tests include fetal ultrasonography and prenatal screening.
Answered 7/5/2015
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