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Health & Pregnancy

Pregnancy Essentials

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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	When they are usually done
First trimester screening (first part of integrated screening)	10 to 13 weeks
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	When they are usually done
Chorionic villus sampling (CVS)	10 to 13 weeks
Amniocentesis	15 to 20 weeks

WebMD Medical Reference from Healthwise

Last Updated: May 21, 2010

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.