Answer
Since CVS tests for genetic abnormalities, the reasons why a mother might choose this test include any risk factors for genetic abnormalities, especially age of the mother and known genetic diseases which the mother has or for which the mother is a carrier.
Work Step by Step
You would only need a test if there was a possibility that the test would show some problem, so check through the chapter for what would cause genetic diseases. These would be reasons to consider CVS.
