Those "natural abortion laws" are utterly bereft of sense:
1) An embryo has its own human DNA signature and therefore its own body and own right to life.
2, 3, 6) There is a huge moral difference between accidental death and murder.
4) Every life is precious, not just the ones outside the womb.
5) There is no such thing as "net life" -- if you abort a child, that child is dead and not coming around ever again, even if the mother has 100 children after that.