I got an NT scan more for curiosity, as my brother has DS and although his type of DS (mosaic) isnt hereditary, i still wanted to know. my mum works for the down syndrome association and i have been involved with fundraising, helping out and been around kids with ds all my life so i knew that if we did have a baby with ds we would have the best support available. i ended up being low risk, but remember this doesnt mean theres still not a chance. not trying to worry you but it just means your at LESS risk.

i would only terminate if it had looked like bubs would not fully develop/survive gestation, i suppose i am alot more informed and 'relaxed' (prob not the best word) about potentially facing DS, they didnt have scans like that when my mum had my brother so it was a total shock but she wouldnt change it for the world, neither would i or any of my family, he might not be 'normal' but has touched so many lives and lives life to the fullest.
alot of ppl say (not in here, just in general) that you should terminate cause they dont get to lead a 'normal' life, but its not about that, its about each person living THIER best life, reaching THIER potential. im not trying to stir the pot im just offering an opinion from someone 'in the know'

not meaning to blab on but basically i think you need to talk long and hard with your partner and discuss the what ifs before you go for the scan...cause if you DO get a 'high risk' result, you wont be able to think straight and may make a decision you will regret. GL