In this procedure, a small sample of placental tissue (chorionic villi) was collected and sent for genetic testing. This prenatal test helps detect potential genetic disorders in the baby.

Another is a chorionic villus sample (CVS) at 11 to 15 weeks, where some cells are taken from the placenta. Both carry a one per cent risk of triggering miscarriage. The new test has been ...

Chorionic villus sampling (CVS) is a newer and slightly more risky alternative to amniocentesis that is performed earlier in the course of development, between 10 and 12 weeks of pregnancy.