Definitions for "Chorionic villus sampling"
The removal of chorionic villi for prenatal testing. Chorionic villi are cells on the wall of the womb which form the early placenta (afterbirth) and have the same genetic make-up as the unborn baby. These cells can be tested to detect certain abnormalities. search for Chorionic villus sampling(also known as CVS)
Chorionic villus sampling (CVS) is a diagnostic test carried out in early pregnancy, usually between Week 10 and Week 12 of pregnancy. Some of the cells which line the placenta, the chorionic villi, are removed through the cervix or abdomen using a needle or catheter. The cells are tested to see whether the developing fetus has Down's syndrome or other genetic abnormalities. Early results may help parents decide whether to terminate a pregnancy in the event of severe birth defects.
procedure used for prenatal diagnosis, which involves insertion of a needle through the abdomen into fingerlike projections of the placenta which are called chorionic villi. This procedure is also performed using ultrasound guidance, and testing can be performed with the tissue obtained. Depending upon the location of the placenta, the tissue may be obtained transvaginally rather than abdominally, by inserting a catheter through the cervix and into the uterus, or transabdominally, with a fine needle. CVS is usually performed at 10 to 12 weeks of pregnancy.