What does the chorionic villus sampling (CVS) test look for?
Chorionic villus sampling detects chromosome abnormalities (i.e. Down syndrome) and genetic disorders (i.e. cystic fibrosis.). This test is different from amniocentesis in that it does not allow for testing for neural tube defects. Chorionic villus sampling also provides access to DNA for paternity testing prior to delivery. DNA is collected from the potential father and is compared to DNA obtained from the baby during chorionic villus sampling. The results are accurate (99%) for determining paternity. What do chorionic villus sampling (CVS) results mean? CVS is a diagnostic test that detects chromosome abnormalities and genetic disorders with high levels of accuracy (98-99%). Although the probabilities of identification are high, this test does not measure the severity of these disorders. This test does not help identify neural tube defects. What are the risks and side effects to the mother or baby? Although CVS is considered to be a safe procedure, it is recognized as an invasive dia
