What do people think about prenatal screening tests.Where should we stop.?

I have a 22yr old daughter with learning difficulties,and when I was pregnant with my son who is now 13yrs old,I was given a test and it came back,saying I should consider a termination as I was what they call( high risk) as my son could die before he was born,or that he could have Edwards syndrome,meaning he would be severely brain dameged,and die within 24hrs of being born,thankfully I had him and he is perfectly healthy,im glad your son is ok,I think the doctors have to make sure they get it right before putting parents through this awful decision.