CVS is a test which tells for sure if your baby has Down syndrome or trisomy 18.
This test is usually done between 11 and 13 weeks of pregnancy.
Using ultrasound, a small piece of tissue is removed from the placenta for testing, usually through the vagina, but sometimes through the abdomen.
Any woman can have a miscarriage at this time of pregnancy. If she has CVS, this risk is increased by an extra 1 in 100 (1%).
The result is available in 2-3 weeks. Most times, CVS will show that your baby does not have Down syndrome or trisomy 18. CVS can not find every condition. Even after a normal CVS result, there is a chance of having a baby with a different condition such as a hole in the heart or mental disability. Remember, most babies are born healthy.
For more details, discuss CVS with your health care provider.
CVS is not available in all areas.