On Abortion Rights as a Moral Issue

I think that PZ has this about correct.

However, the equivalence of mother and fetus is an untenable proposition. A mouse has more complexity and autonomy than a fetus, and we don’t even hesitate when the choice is between the life of a mouse and a human being. We don’t even argue about it. And to argue that a single-celled zygote or even an embryo with a few dozen cells at implantation is anything but a negligible component of any moral equation is utterly absurd. It’s a fantasy of the deeply ignorant, the kind of people who think the babies on Pro-Life Across America billboards are actually accurate representations of the age-specific fetus, to think that there’s something cute, adorable, personable about a self-organizing mass of cells.