With my second child, I was told there was a 1/11 risk that the baby had trisomy 18, which if she had it meant there was no way she would live. She is now a healthy 3-year-old. So many moms go through this worry that some people opt not to have these tests at all, since it is extremely stressful and most times the baby is 100% OK. There are "false positives" in the testing, especially if they have your due date off. But even without factoring that in, the tests aren't predictors, just analyzers of risk. To cover themselves, doctors have to tell you if there is risk. Realize that 1/126 means that you have a better than 99% chance that everything is fine! Doctors have to tell you if there is a greater than average risk of some kind of problem, but doesn't that mean that 49% of women will be told their numbers show greater than average risk? The amnio is the way to be 100% sure, but until then or if you decide just to do the ultrasound, feel positive and know that the odds are definitely with you that you have a completely healthy baby. Good luck!