Chorionic villus sampling

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Chorionic villus sampling

The risks of CVS are only slightly higher than those of an amniocentesis.

Possible complications include:

• Bleeding
• Infection
• Miscarriage
• Rh incompatibility in the mother
• Rupture of membranes

Signs of complications include:

• Excessive bleeding
• Excessive vaginal discharge
• Fever

Report any signs of complications to your health care provider.

CVS was previously thought to cause limb problems in the developing baby. When CVS is performed after 9 weeks gestational age, this risk appears to be very low (6 per 10,000), and is no more frequent than in pregnancies without this testing.

If your blood is Rh negative, you may receive RhoGAM to prevent Rh incompatibility.

You will receive a follow-up ultrasound 2 to 4 days after the procedure to make sure the pregnancy is proceeding normally.

Review Date: 06/05/2010
Reviewed By: Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington, School of Medicine; Susan Storck, MD, FACOG, Chief, Eastside Department of Obstetrics and Gynecology, Group Health Cooperative of Puget Sound, Redmond, Washington; Clinical Teaching Faculty, Department of Obstetrics and Gynecology, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org).

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