I have run into this absurd moral relative position many times -always from an abortion advocate attempting to turn reality on its head and by false premise insinuate apparent hypocrisy within the pro-life position...
It is real simple --abortion is intentional murder, miscarriage is not intentional murder - no, not even "spontaneous" abortion is intentional murder...
My point was, we need to treat the unborn as real human beings in every respect - and the society at large, even with abortion aside, doesn't. Polio or hard measles or scarlett fever were not intentional murder either, but we worked hard to eradicate them. One could have argued that one in five, six, ten whatever children dying before the age of five was "the natural order of things"; however a technologically advanced culture doesn't accept that fate.
People make the bogus argument, with absolutely no data, that spontaneous abortion happens only with deformed pre-borns, or "mistakes". First of all, this is just speculation, second of all, why is the life of a deformed preborn worth less than a "perfect" preborn?
Start pointing out the unquestioned assumptions in this debate, and we might be able to shift the country's attitudes.