And no, I don't really care about a fetus' life, honestly. Yes, I think a fetus is a living being, but not a self-aware human being. As long as it doesn't even feel pain, I don't really mind killing it. Of course killing a living being is always a bad thing, but don't we kill animals to eat them, or to make scientific experiences ? Yes, a fetus is a life, but not yet a human being. It deserves some dignity, but not the same we give to full human beings.
And what of the severely mentally handicapped? Are they full human beings? And if they aren't, then should they have less rights than the rest of us? And to what place does that lead us?
I think in general that it's better not to philosophise too much over issues like this. Better to accept the necessity of imperfect and necessarily contradictory compromise.