I am not sure I anayzed this decision when I first heard of it. Now? Having J in my life? I would do probably just about anything to keep him alive and healthy.

Many people have more than one child solely to keep the other child from being an only child. Not sure I see such a big difference. As long as the child is loved and well cared for, it's 'reason' for being doesn't have to be its 'purpose' for being.