Although I am more "pro-life" than the majority of those who are simply anti-abortion, I don't think this question is directed at the countless indivuiduals who do not see the subject as just a 'black & white' one.
From what I've been able to find about this particular girl child who was sickeningly raped and impregnated by her father, she was little more than 6 weeks pregnant when it was confirmed. It is just about unfathomable to me, how anyone could actually see aborting an embryo or fetus at that stage, as somehow compounding an evil...or killing an innocent life.