I would continue I have a disease that may affect all my children I have two dd without it(it could show up later I have been told) but they are still carriers of the gene so it is on going and may affect their children and so on.
I refused the tests despite pressure from the doctors. I did not care as I have known many people who were told to abort as their children would not have a good life, my neighbour from 3 years ago had a granddaughter who was only meant to survive 3 weeks max and is now in her 20's she is disabled mentally and chair bound but a very lively "child".
I guess it depends on the individual as a lo of people I have met see people with Autism as someone they need to feel sorry for, I love my DD and would not change my choice even though I have heard of a few people who broke down over not having a normal child
ETA.. if I had a choice now and my life was in danger yes Id abort but only for the sake of my other children