Nine Months : The Chorionic villus sampling procedure
CHORIONIC VILLUS SAMPLING : Procedure
 |
An ultrasound scan is done to check the position of
the baby and the placenta.
Click here to see how an ultrasound scan is carried out. |
|
While continuing to
monitor the position through the scan, a fine needle is
passed through the wall of the abdomen. (Sometimes a fine tube may be passed through the vagina into the womb). |
|
A sample of the chorionic tissue(fingers of tissue that form part of the placenta) is extracted through the needle or tube. |
|
The chromosomes in the sample are studied to provide conclusive result |
|
| Nine months |
