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Dr. C.
Dr. C., Board Certified
Category: OB GYN
Satisfied Customers: 2537
Experience:  30 years of experience and an award-winning educator.
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We are pregnant age 32 and our first trimester screening

Customer Question

We are pregnant age 32 and our first trimester screening results for Down Syndrome was 1/1700, but it said first trimester screening detects Downs babies only 90 percent of the time. I'm confused by how to interpret the true odds given the 90 percent reading.Also I'm a little unclear onwhether a quad screen is necessary if first trimester screening shows "low" Downs risks.Thanks.
Submitted: 1 month ago.
Category: OB GYN
Expert:  Dr. Tim, MD replied 30 days ago.

Please see my other answer to your question. Please respond to that question stream first and ask followup questions in that stream as well.

Dr. Tim