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How Accurate Is NIPT For Down Syndrome?

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Posted on Thu, 2 Feb 2017
Question: Hi, I am XXXX, Age 32. I am 13+ weeks pregnant. In my NT Scan that I took last week, my betaHCG was came out to be 122.00 ng/mL. This led to a high risk calculation for Trisomy 21 Screening to 1:172. In my Ultrasound for the same test, the background risk was 1:528 and Adjusted Risk was 1:2335. According to the radiologist, everything looked fine in Ultrasound. However, after consulting a genetics specialist, we have gone for NIPT. I am really worried about the outcome. What are the chances of report coming negative for Trisomy 21. Please help
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Answered by Dr. Dalia Muraleedharan (42 minutes later)
Brief Answer:
Hi

Detailed Answer:
HI..
Thanks for writing..
I understand your concern..

NIPT gives 96 percent accurate result. The false positive result with first trimester screening is high.. So don't worry.. There is a good chance for NIPT to be negative..

Also NIPT is not confirmatory result.. If it's positive confirmatory test like amniocentesis might be required..

Hope I have answered your query. Feel free to ask any doubts. Good day.
Above answer was peer-reviewed by : Dr. Prasad
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Dr. Dalia Muraleedharan

OBGYN

Practicing since :2003

Answered : 1044 Questions

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How Accurate Is NIPT For Down Syndrome?

Brief Answer: Hi Detailed Answer: HI.. Thanks for writing.. I understand your concern.. NIPT gives 96 percent accurate result. The false positive result with first trimester screening is high.. So don't worry.. There is a good chance for NIPT to be negative.. Also NIPT is not confirmatory result.. If it's positive confirmatory test like amniocentesis might be required.. Hope I have answered your query. Feel free to ask any doubts. Good day.