For anyone with a supposed biblical objection to abortion, I refer you to the masterful essay as follows:
http://www.theskepticalreview.com/political/Bible.html
There is no solid basis to oppose abortion in the bible. If you are going to deny that, read the article and provide a well reasoned rejoinder.
My desired stance is as follows:
1. Once a fetus is viable for development outside the womb and apart from the mother, it is a being.
2. Medical science alone determines when the above is the case.
3. Before such a point, abortion is available on demand. After such a point, the available option is removal of the fetus.
4. This would be trumped by a health concern for the mother. The concurrance of medical science and the opinion of the mother would decide what to do in this case.
5. Those who don't like this arrangement can be encouraged to spend their energy on sexual education (not abstinance only, mind you), adoption, and investing in medical research on the issue, rather than parading haunting images about which represent a tiny fraction of actual abortions.