There's also a significant rate of false positives for this type of screening, IIRC.
Several months later they had a perfect baby boy with no problems whatsoever.
A year later, my wife and I were pressed by her OB to have the test because she was going on 38. We told them no, that no test result would change our approach to having the baby. I bet we had to tell that doctor at least 5 times that we would not have the test, but she kept on giving us emotional reasons that we might need it. I thought I would have to slap the woman before we left.
My suggestion is that since the test is so poor at predicting problems, turn it down. If you would never have an abortion, it will not make a difference. If you would have an abortion, you might kill a healthy baby.
There is also an increased chance of miscarriage with the procedure, IIRC.