1 in 600 is still a really good number Mrs_Eleflump! I don't really know how they calculate it, I think its something to do with bloods, weight and age?
I do good on the age factor as I just turned 25 but Im over weight.
we were iffing and ahhing about doing the screening as we'd have been more than happy to carry on the pregnancy if the results came back that baby had downs, but we decided it'd be better to know and to prepare.
Thank you SisterRose
I'm 32 and will be 33 when baby comes, so I think that probably had a lot to do with our number.
I'm also slightly overweight - I started about 5lb overweight - 10st 10 when I should really be 10st 5 or under), but have put on 10lb so far this pregnancy, and they took that weight, plus the 7lb that I swear the hospital scales always add on, to do the calculations, so that probably artificially upped the risk too.
Regardless of what the risk factor is, baby's NT was 1.6 (they wrote 1.8 in the report, but told us 1.6 at the scan

), and the sonographer said there was absolutely nothing she'd seen that gave her any cause for concern. I'm just a big stress-pot!
I hope this doesn't sound bad but if baby did have a serious problem I really don't know what we'd do. It's a 'cross that bridge if we come to it' thing, I suppose, and the decision is based on so many factors, so I feel it's impossible for us to say what we'd do unless we were in that situation. I want to know as much as possible though, I'm a firm believer in being prepared!