Sarah - the 12 week test is just an u/s with bw like you had but if the results come back with a certain risk, they follow up with an amnio & take some fluid from the sac to test ( i think) which has a risk of mc. It makes no sense for me to do the 1st test if it won't affect our decision to have the babies. I guess it could help you be prepared but in the baby stage at least, a DS baby still requires the same care, maybe more medical follow-up if there are issues. I worked with DS adults for a year and there is such a range. There were a few that were completely independent, could read & write & held jobs and there were a few that needed constant care. Honestly, this pg is going to be so many appts and so much work missed, if i can avoid a test or 2 i'm going to do it. Hope your bump shows up soon