That 'decision' was made when man fell from grace! We became imperfect and thus inherited all of the sorrows and woes that come with sin and imperfection .. including imperfect genes!
Too, if a mother chooses to drink, smoke, do drugs during pregnancy .. That also could account for all sorts of maladies!
Sure sounds a LOT More scriptural than you wanting to believe that GOD makes the decision to maim a child before it is born!
Don't recall I made that assumption...you did...now after wading through your gibberish about "man falling from grace and therefore imperfect and then jumping to the fault being that the Mother chooses imperfect lifestyles, such as drinking, drugs etc.. what is it? You can't work both sides of the street...either God is in charge and control all...hence prayer works or....what.......