It doesn’t work.
How do you make a pro-lifer, pro-choice? You're not likely to change their mind about when human life starts. The only time I've successfully changed someone's mind about the legality of abortion, I made an argument based on data that shows that if abortions are illegal, more women die than if abortions are legal, usually in horrible ways.
If you really want to reduce the amount of abortions that occur, you have to reduce the amount of accidental conceptions. And the only proven ways we have of doing that are typically found unpalatable by the pro-life crowd. They don't want to give teenagers condoms, they want them to be celibate, and in fact find the idea of promoting healthy, non-procreative sexuality abhorrent.
And that's on an issue that I think is pretty cut and dry as far as public health/well being is concerned.