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    Birth Defects Testing - Types of Tests

    You and your doctor can choose from several tests. What you choose depends on your wishes, where you are in your pregnancy, your family health history, and what tests are available in your area. You may have no tests, one test, or several tests.

    Screening tests show the chance that a baby has a certain birth defect. Diagnostic tests show if a baby has a certain birth defect.

    Screening tests
    Tests When they are usually done

    First-trimester screening (first part of integrated screening)

    10 to 13 weeks

    Nuchal translucency (usually done as part of the first-trimester screening)

    11 to 14 weeks

    Cell free fetal DNA (an option for women at higher risk)

    10 weeks or later

    Triple or quad screening (second part of integrated screening)

    15 to 20 weeks

    Ultrasound (pictures of baby's body)

    18 to 20 weeks

    Diagnostic tests
    Tests When they are usually done

    Chorionic villus sampling (CVS)

    10 to 12 weeks


    15 to 20 weeks

    WebMD Medical Reference from Healthwise

    Last Updated: November 14, 2014
    This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
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