As much as I hate doing this, I guess I'll have to summarize some of the pro-choice points mentioned earlier in the thread. (Really though, what's wrong with reading?)
-Just because a person believes that it is okay to legalize abortions does not mean that they want people to have them. Some may even believe in limitations to abortions i.e. certain cut-off times, assessment of situation, etc.
-Abortion is not murder, period. Murder is a legal term, and as long as abortion is legal, it is not murder. Pay attention to this or AC will rip you to shreds
-Pro-choicers generally do not believe that foetuses are people. The definition of a human being is highly disputed, and of of yet cannot be proved conclusively either way, although there is some evidence supporting both sides (I believe more so for the pro-choice side) so this is merely a matter of opinion.
-If it is admitted that foetuses are not people, the potential for life is not a solid enough argument to outlaw abortions. If everyone dealt in potentialities, so many things would logically then become illegal that merely living would present serious difficulties. For example, car accidents would mean you killed possibly thousands of people, or those who 'don't get any' would be killing their possible future offspring by not reproducing. Thus, potentiality cannot be a logical argument.
-To add to this, what is more important: a possible life, or a person's right to choose? Hypothetical situation to think on: if you were to choose between living the life you live now, with preventable deaths occuring all the time or living in a totalitarian regime where you had no rights, no freedoms, but everyone was kept alive, what would you choose. A certain phrase springs to mind: "Give me liberty or give me death"
-Finally, life after birth has to be considered. Without abortions, some lives are ruined. Some women (and men) can overcome the obstacles presented, not all can. Many abortions are done by women already living in poverty, and adding a child may in fact result in two deaths. While you could say that not all cases are like this, some are. Period. And yes, I am aware that I used the potentiality argument, but in this case, it is a little different. With people so obsessed with having as many people alive at one time as possible, they must also consider the possibility of causing death through their actions.