And a chance of not being killed in utero. Abortion for Down is sad, because despite cognitive impairment and health complications, their lifespans are long, and emotional development is quite spared by the syndrome. They can be very affectionate and sociable, despite the impairment. Abortion for them feels like death penalty for being dumb.
Becoming a parent and taking on the responsibility to support a child financially and emotionally for 18 years as you gradually prepare them for independent life is already a massively difficult decision, particularly when looking at the worldwide decline in birth rates. Expecting people to knowingly and ahead of time take on responsibility for a child who most likely will never be able to support themselves and a raise their own family seems really unreasonable to me.