I had an u/s at 9 weeks due to spotting (everything was fine) and I asked the Radiologist about NT scan, in his opinion it is an unnecessary test. He pointed out that there has been very few instances where the test has been correct. He said to me that he has seen u/s where you would think that there would be not a chance that the child has a problem and then they are born with Downs, and the same for the other side, he has seen scans where the fold was so thick and the chances are so high, yet the amnio came back fine. Then there is the risk of m/c. I have never had a NT with my children, but I must admit I was tempted this time I don't think I would terminate anyway, so I just let it go. I think it is a decision that you and your family have to make, and discuss all the pros and cons for getting one. Best of luck what ever you decide