I am really sorry that you lost your baby, Madwoman - that's tragic 
Just wanted to explain why I wanted to know - though I wasn't offered any testing so didn't have any.
It wasn't so I could terminate - I didn't want to terminate in those circumstances. It was to prepare.
I have a friend I haven't seen in a few years, who had a little boy with Downs. She didnt know he had it till he was born.
He was really poorly - he couldn't suck, was very floppy and poorly and had a lot of difficulties from the off. I don't think she recovered from the shock and sadness. Certainly the first few weeks, the first year even was hellish for her - he was and is afaik a dear little boy but with profound difficulties. He must be 8 now, we see him sometimes around town.
I didn't want to go through that shock and adjustment with a new baby to care for - I understand there are many variations on the effects on the child, but I wanted time to get my head around it if my child did have it. So I could be ready for the likely issues. Such as things like not being able to breastfeed (I know some children with DS can) and asking my family to be around to help a bit more, that sort of thing. And I'd have wanted to be prepared for any necessary interventions during labour and the second bit of pregnancy, too as I believe there are greater risks in certain areas.
That's all really.