Whoa there Nelly, that is a slippery slope is it not? Who deems it as necessary? I can understand incest and rape, but what about the ones, the "it" is an inconvenience or an oops?
I still like the notion of sewing the snatch up or dick not able to produce baby making sperm until they are wise enough to take care of the oops or inconveniences.
I imagine the abortion exempt also protects the doctors during live vaginal births that go bad. Sometimes they can save one and not the other.
I'm not a big proponent of abortion but it's not fair for you or I to expect 'other people' to go through with births if the child has serious developmental issues. The parents lives are over once they go with giving birth to a handicap newborn.