If you have any risk factors for having a fetus with a birth defect, talk with your doctor or a genetic counselor to help you decide which screening or diagnostic tests will be useful for you.
You may be at risk for having a fetus (baby) with birth defects because:
Women with known risk factors are usually offered a chorionic villus sampling in the late first trimester or an amniocentesis in the second trimester. If you have an amniocentesis, a triple or quadruple screen test for Down syndrome and birth defects is not necessary.
To learn more visit Healthwise.org