CVS is a procedure where small samples of cells from the baby’s placenta are removed.  It can be done in two ways, depending on the position of the placenta in the uterus.  In our office our physicians perform the trans-abdominal procedure, where a thin needle is guided through the abdomen.  If the placenta is at the back of the uterus, a CVS can only be done by inserting a small tube through the cervix (opening of the uterus).  In these cases, the patient may be referred to another facility.

CVS involves a risk for miscarriage of about 1 in 100 (1%).  The procedure is performed between 10 and 12 weeks. CVS is usually performed to detect chromosome problems (such as Down syndrome). However, it may also be possible to perform genetic DNA testing, if indicated.