Chorionic villus sampling
Abbreviation: CVS
Chorionic villus sampling (CVS) is a diagnostic procedure performed between 10 and 13 weeks of pregnancy. A small sample of placental tissue, called chorionic villi, is taken either through the abdomen or the cervix using a fine needle or tube guided by ultrasound. The tissue shares the baby's genetic make-up, so it can be tested to diagnose chromosomal conditions like Down syndrome, as well as inherited genetic disorders such as thalassaemia. CVS provides a definitive yes or no answer, unlike screening tests. The procedure carries a small risk of miscarriage, generally estimated at around 0.5 to 1%, and should be performed by a trained specialist.
What This Means for You
Understanding Chorionic villus sampling is an important part of your first trimester journey. During pregnancy, your care team will use this term regularly. Being familiar with it means you can ask better questions and feel more confident at your antenatal appointments.
Explore our Pregnancy hubGood to Know
CVS is offered at KKH and NUH by maternal-fetal medicine specialists. It is usually recommended when NIPT or NT scan results show high risk, or when there is a known family history of a genetic condition. Discuss timing and personal risk with your doctor before deciding.
Related Terms
Source: https://www.acog.org/womens-health/dictionary
Always consult your healthcare provider for personalised advice.
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