The tests come back as a certain chance of having a baby with downs. So say for eg. 1 in 12 chance is pretty high. This will be based on her maternal age, her bloods and the nuchal fold at the back of the babies neck. It is really up to her if she waants to have an amnio. I would suggest she does, its hard enough bringing up a baby than bringing up one with a disability, so she needs to be prepared.

Yes Amnio's can cause a misscarriage but its a very low risk and atleast then she will get the answers she wants.

At the end of the day it is up to her...

ps. Are you able to tell us what her results were???