I'm not comfortable with the idea of such late stage abortions, but I'm very much pro choice and appreciate that there may be situations where a woman/man decide this the right thing.
I've got two friends on Facebook with children with down syndrome, they are very vocal on the matter and I can emphasize as I can see why they have interpreted as their children's lives not having meaning because they have down syndrome.
Which is completely not the truth, I think majority of people would agree that once that child is born that they want that child no matter their disability to lead a happy, healthy and fulfilling life and that they would want society to enable that childs right to enjoy a quality life.
However, most of these posts from people who are anti termination for down syndrome are painting a very rose tinted picture. The majority of down syndrome individuals you see are the individuals who are high functioning, able to go about their lives with levels of autonomy, able to develop personal relationships, hobbies, goals and aspirations.
The individuals that are rarely mentioned are those who are low functioning. Those who require full time supervision all their life because they forget to chew, try to put outdoor objects in their mouth, would run into roads, screams and cries, isn't able to communicate, is doubly incontinent, doesnt understand its not appropriate to take pants off in public, is in and out of hospital all the time due to being naturally more prone to respiratory conditions and cancers. - and before anyone thinks what I've wrote Is an offensive list of descriptions, these are genuinely individuals I have worked with. 2 adults I worked with required eye sight observations over night, every night even as they slept as they were such a high risk to themselves. And this will likely be the case for the rest of their lives.
I wouldnt for any second say they shouldn't be alive, but from the mothers/fathers perspective when you have a child, you typically expect full on parenting for a few years till they get their independence and you can focus on other things such as careers and just generally having your own life. If you have a child with significant needs you dont get that. It will be 24/7 worry till the day you die. If you have a child / adult with significant care needs that will dominate your entire existence, you will have to live with hard decisions such as potentially placing your child/adult child in residential care, the worry that when you die you have to make arrangements that they are supported. I have seen parents absolutely destroyed and become shells of people due the worry of raising a child/young adult with such complex needs.
I dont think any parent should be forced into the decision to go through with that. Down syndrome is a spectrum, and some individuals will have amazing lives and be an absolute joy for the parents to raise, some wont. I think it's fair that parents get to choose not just whether they want to take a risk, but whether or not they deem themselves actually able to meet the demands of a high needs child.