My friend was told with her first pregnancy that she was high risk, she then went on to have "the other test" as I like to call it and was told everything was fine, he was actually born 6-7 weeks early and she had heard somewhere that it could have been caused by "the other test" I don't know if it was just a coincidence or not, I myself have had the NT test with both my daughters and I will have it with the next baby as well.