Desert Storks

Pregnancy tests - chorionic villus sampling

Chorionic villus sampling (CVS) is a pregnancy test that checks the baby for genetic or biochemical abnormalities. The placenta is made of the same cells as the baby, so the baby can be tested by taking a small sample of the placenta. The sample is removed using a slender needle inserted through the abdomen. The tissue (chorionic villi) is then examined in a laboratory.

Unlike other pregnancy tests such as ultrasound, CVS isn’t a general check of the baby’s health but a specific test for particular abnormalities, such as Down syndrome or cystic fibrosis. The risk of miscarriage following CVS is one in 100, so it is important to thoroughly understand the benefits, risks and complications before agreeing to take the test. Generally, CVS is offered between 10 and 19 weeks gestation. Read more »