What gives you the right to decide that life is unforth living? I'm not saying that it isn't going to be hard but I think it is wildly unfair to take away someones life. If you choose not to have kids due your own experiences that is fine but don't do more than that.

There is a movement in the in the downs syndrome community to stop terminating pregnancies. The rational is that people deserve to at least have a chance at life even if it is hard. It is a hard problem but I think the biggest danger is people seeing anyone who is different as likely to suffer.