think Harris was making the point that, if abortion is such an evil in God's eyes, He is acting in direct opposition to that belief by making it happen naturally. If you're an atheist, the argument is meaningless, since the high rate of natural miscarriages is just an outcome of the evolutionary process.
This is a well crafted argument. Nothing I've read rebuts it very well.
That doesn't involve human intervention though.
I'm thinking the problem most people on the board seem to have with the American model is the refusal to accept that there is a point that happens, prior to birth, when the fetus becomes a 'person'.
Because 'Personhood' includes in its definition the capacity to suffer. Science has proven beyond 20 wks a baby can.