Hi - did you find out any more since you first posted? I hope everything turns out fine, and in nearly all cases it does. My NT meausrement with my last pregnancy was 2.3mm, but the bloodwork pushed me very high risk. Had CVS and found out my baby did have DS. I'm now about to have my NT scan for this pregnancy, and am very anxious about it. Sometimes I wish this test just wasn't around! Good luck! Lee x