Increased and welcome acceptance of people with Downs Syndrome and other conditions leads people being more willing to have high risk pregnancies and reducing their likelihood in selectively terminating.
Please correct me if I'm wrong ... but assuming "high risk pregnancies" are universally viewed as a negative, it almost sounds like you're saying the acceptance of people with DS is a bad development?...
Absolutely not. I don't think you understand the term. Having twins is technically a high risk pregnancy.