You know that just because the kid might have a chance to develop mental disabilities doesn’t mean the child is going to have a life of ‘‘misery’’ the child might be able to live a full life, the child might require a bit of support or might require alot of support depending on the severity of the child’s mental disabilities
Plus who the fuck are you to decide whenever a life is worth living or not. This decision in this very specific situation should be upto both the parents and doctors