Well hey - I don't mind a good head to head. Let me suggest that the question of when a fetus becomes a child has nothing to do with biology at all. Its entirely a social decision. If the society has determined that it is not a person until some specific point in its development, then it isn't, and aborting it before then is not murder. Morals and ethics are not some absolute standard - they are always what a given society has determined they are, and they change over time.
In this case, the very real question of who owns a citizen's body is also a consideration. Any attempt to restrict a woman's access to an abortion is quite literally to assert that the state has some right of ownership over her body. (Of course, the state DOES consider that it has rights of ownership over the bodies of its citizens, since it restricts what can be put into them - but in neither case is it often argued from that point of view).
Actually, this debate is, by definition, not resolvable, since both sides have valid arguments (though each side naturally considers its stance valid and the other's not). Which is why it MUST be a decision that the society makes. For better or worse, the US, along with most of the western world, has made a choice. Some peope don't like the choice that was made, but, as with so many things, that's just tough. Personally I find it repugnant that Plastic Surgeons are far more valued than Secondary School teachers - but that's how this society sees things.
- Yoj