How to Know When to Have a Chorionic Villus Sampling

A chorionic villus sampling (CVS) is a genetic test performed early in pregnancy to screen for more than two hundred congenital diseases. A CVS, performed 10 to 12 weeks after a woman's last period, detects genetic abnormalities much earlier than amniocentesis. A prenatal diagnosis of genetic abnormalities is available within one to two weeks after testing. A chorionic villus sampling does not screen for neural tube defects or Rh incompatibility. Read on to learn how to know when to have a chorionic villus sampling.

Difficulty: Challenging

Instructions

1. Learn more about the risks and benefits of genetic testing when you learn you are pregnant. Decide if genetic testing is right for you and your family.

2. Discover the medical history of you and your partner's family. Investigate if any inherited diseases are present in either of your families' history. Consider genetic testing if your discoveries cause concern. A CVS test detects Down syndrome and Tay-Sachs disease early in pregnancy.

3. Consider genetic testing if early ultra sounds or other testing reveals a high probability of genetic problems. Discuss a CVS test with your doctor.

4. Assess if pregnant women in your age group are at a greater risk for genetic abnormalities. Consider a chorionic villus sampling if your age increases your risk of congenital abnormalities.

5. Talk about genetic testing with your partner and explore your opinions on the issues involved. A CVS test often includes required participating in genetic counseling.

6. Discuss genetic testing with your health care professional. Request a detailed explanation of risks to you and your fetus before allowing any invasive prenatal testing.

Resources

• MedlinePlus Website
• Baby Center Website