Alibaby - You might want to check that the OB will do your scan then. I arrived for my NT at 11w 6d and had to go back again a few days later as my OB wouldn't do it until I was 12 weeks so might be worth checking that they will do the scan before that. The receptionist knew exactly how far along I was when it was booked and told me it didn't matter. It was quite annoying. I did get to have a sneak peak free scan done though so that was nice.

sakoon - the important thing to remember with this test is that it doesn't give you a diagnosis it just gives you a risk factor. For example I got a 1/37 risk of DS (mostly due to my age but also because of a high nuchal fold). This meant that of 37 women with the same risk factor 1 would have a DS bub. There's no way of telling from this testing if I would be the unlucky one or one of the lucky 36. Turns out I was one of the lucky ones as bubs was born without it. So basically even if you have a risk factor of something like 1/1500 you could still turn out to be that 1 person who has a DS baby even though the odds are against it. The only way you can have any certainty is to have an amnio or a CVS but normally they wont recommend it unless you get a high risk with the NT test. That's why some ladies don't bother with the NT test.