To answer the original Q my mum had a risk of 1:50 with my brother who is here and perfectly healthy and "normal"... Well, as normal as 18 year old boys can be! So although the numbers may be low sometimes they are just that, low numbers and nothing more.

Ryders Mum, it's all very well to say take the chance, but I think these things need to be looked into and research carefully, and Mummy of bub needs to be comlpetely 100% sure of her choice and comfortable with it. At the end of the day it is possible to misscarry a perfectly healthy baby from an amnio, and it's not a "chance" that should be taken lightly.