I echo those who say that the stereotype of the happy smiling downs syndrome child is just that. A stereotype. And not a particularly representative one.
Others have outlined clearly how much more complex and disabling the condition can be. I don't intend to repeat that.
I add that, in my experience, even if a child meets the 'happy, smiling, loving' stereotype, then their adulthood can be bleak. There's two reasons for that. Firstly, DS is strongly associated with early onset, severe dementia, which not infrequently causes real confusion, violent outbursts and inconsolable distress to the individual.
Secondly, this happens just as the parents get elderly and are no longer able to cope with an adult-sized child who is confused, distressed, agitated and violent. I have seen a number of individuals go from being loved, happy and well-cared for to deteriorating rapidly in a residential setting, in really a very few years.
I make two arguments. Firstly, late-term abortions are thankfully rare. No woman chooses to have a TFMR lightly. It's a heartbreakingly awful outcome to a much wanted pregnancy. As such, it should be a decision made by the woman with the assistance of her doctors, and noone else.
Secondly, Heidi Crowther's activism would do much more for the lives of people with Downs if she used her platform to advocate for improved social care and support for these individuals. That - unlike this legal case - could make a real difference.