Dan, I actually do believe that life begins at conception and I personally would not ever have an abortion.
Having said that, I believe that outlawing abortion would have disasterous concequences, particularly when you consider that many of the people who would see it done do not support public assistance once the child is born, do not support increasing the availability of birth control options or sex education and actually would make it harder to get birth control if given the opportunity while teaching kids to "just say no" to sex.
The best scenario in my own view is to thoroughly provide education to ALL children throughout the school years as well as provide access to birth control. However the same people who would outlaw abortion would not support this plan. As much as I personally hate to think of killing a baby, I am much more disturbed by the idea of millions of unwanted children being born into poverty, neglect and violence without access to good education, healthcare or love.
That's what it comes down to for me.