Of course, if we all agreed on what rights a fetus has and when it has them, the debate would be over.
The ability to safely transfer an embryo or fetus helps eliminate health related abortions(e.g. if the mother develops severe gestational diabetes). The baby on ice may or may not be repugnant(invitro fertilization was once considered unnatural), but there are women who want to have children, but for some reason (job loss, family crisis) do not want it right now. I have personally known women who did not regret delaying having a child via abortion, but did feel sad about that potential child.
That is the point of the perfect positive birth control. If both man and women must take a positive step (like going to a doctor to have an implant disabled) before a pregnancy is possible, no one will become a parent unless they want to. To me that only leaves the case of someone wanting to get pregnant and then changing their minds.
Do I think this will eliminate all abortions? No, but it would eliminate the reasons for the vast majority of them. If the majority of the population can get beyond the all or nothing mentality that defines this debate, maybe we can work towards goals of eliminating unwanted pregnancies before they occur and offering women a wider choice of options. That would achieve both goals of more choice and fewer abortions.
I would prefer not to go down the moral relativist path. You can’t point out that rights of personhood for fetuses and infants are western construction without also allow that reproductive rights for women have varied across time and culture as well. It really shouldn’t matter to our debate if the Carthagians threw children into a fire in the belly of their god statue or if Kuwaiti women are not allowed out in public.
Jonathan