Hi Maria,

The stats are there based on age alone however when you have your 12w scan and blood test they combine these results for your own personal risk. An example is that for my age I have a risk of 1:150 however after my scan and the blood test my personal risk was 1:1800, this meant that based on my age alone I would have been recommended for an amnio (I think if less than 1:300 they recommend) however based on my personal risk there was no recommendation for further tests.

I think you and your DH need to decide what you want to do if you need an amnio or CVS and what you will do based on results from that. However at this stage I don't think you can decide that you will or will not have the amnio ro CVS until you get the results from your 12w scan & bloods.