I went in for a regular first trimester screen and was told everything looked great, only to be told a few days later my baby was at high risk for Downs. Had that test done andDowns  came back negative but it came back positive for Turner Syndrome....they said 60%. We don't want to do an amnioscentisis due to the risk of miscarriage. I keep asking what the false positive rates are and my doctors won't tell me. Does anyone else have experience with this? Or have anything to look for or ask about at future appointments? In our initial appointment, the fluid behind her neck was 2.4 and they said everything looked "beautiful".