How Accurate are Nuchal Scans? - Partners in Women's Health » Partners in Women's Health

How Accurate are Nuchal Scans?

By admin February 11th

Nuchal scans are screening tests – not diagnostic tests. This means that they can be used to assess the risk or likelihood that your baby has an abnormality, but they cannot be used to diagnose a condition. If your nuchal scan does detect an abnormality, you will then have the option to pursue further diagnostic testing.

First trimester combined screenings typically detect Down Syndrome 85 percent of the time. However, they also give a false positive 5 percent of the time, meaning that they indicate an abnormality that doesn’t exist.

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