Chorionic villus sampling carries various risks, including: Miscarriage. The risk of miscarriage after chorionic villus sampling is estimated to be 0.22 percent. Rh sensitization.
What are the risks of chorionic villus sampling?
Risks of the procedure
- Cramping, bleeding, or leaking of amniotic fluid (water breaking)
- Infection.
- Miscarriage.
- Preterm labor.
- Limb defects in infants, especially in CVS procedures done before 9 weeks (rare)
Is CVS safer than amniocentesis?
Second trimester amniocentesis is safer than early amniocentesis or transcervical CVS, and is the procedure of choice for second trimester testing. Transabdominal CVS should be regarded as the procedure of first choice when testing is done before 15 weeks' gestation.
