Trust me, I respect pro-life sentiments now that I have had a child, but even after having a baby, I still support abortion for reasons that are too intangible to be argued on the basis of morality or life vs. death... I look to sociological facts:

From an anthropolgical and sociological perspective, this simple act allows half the population to be free and determine her destiny in her society.

Societies where women are enslaved by their uterus ,their legal and educational stauts is subpar. Societies that define women by their reproduction does not allow them to support themsevles or educate themselves, and women and llittle girls are secondary citizens. When burdened with a family to feed and a husband that dies, these women starve or prostitute themselves and their daughters.
As a Trekie I quote from Spock in The Wrath of Khan " The good of the many outweigh the good of the few." The few are the aborted fetuses, the many is the unshackelling and freedom of half the population of any society so that they can be free to use their "brains" and not their uteruses. In these societies, women who decide to give birth to their daughters know that their daughters standing in society is good and solid, and not degraded into reproductive chattles for men. The quality of life for these daughters are now more assured ( not gauranteed of course)