What would worry me, if I had a pregnancy with a high risk of Down's, would be the long-term future. The way the child would be treated by SS and health professionals.
My sister is an LD nurse and is often a lone voice standing up for her patients. SS and the NHS often treat people with a lack of respect or even inhumanely - one of her patients suffered a head injury (in the community), had surgery, was sent to her unit for recovery, had a seizure, was sent in an ambulance to A&E. A&E refused to assess the poor man because he was 'non-compliant' (he had a head injury and LDs, FFS, it would just take a little more effort than usual, why not try calling an LD nurse for advice? Sister couldn't accompany because she was the only qualified nurse on duty in her unit, which is a whole other story).
A&E sent this head-injured patient straight back to the unit where my sister works, basically saying bog off, keep him there, we don't care if his medical condition deteriorates.
Then there are the patients who were discovered having sex and separated because people with LDs aren't allowed to have a sex life... they were clearly keen on each other because it happened again, they were separated again and treated like naughty children.