I'd like to respond to this, but I want to make sure I'm responding to your actual point and not my idea of your point.
Would you mind defining "disabled"? Is that a comprehensive term, or limited to severe disability? If latter, what do you consider severe?
Beyond that: are you saying categorically that disabled fetuses ought to be aborted? Or that you personally would choose to abort a disabled fetus every time? Or none of the above?