@engineer,
Engineer, you are setting up a
false dilemma. That is a logical fallacy. You are asserting that there are only two possible stances. In truth there are a large range of opinions involving what constitutes life, when it is "human" life, and when it is morally permissible to take life.
You are asking my personal opinion (you are trying to set an argumentative trap, but I will walk in any way), so here goes. This is my personal opinion... there are other opinions.
1. I believe that a fetus very early on gains life by any reasonable definition of life. When it has a beating heart and a working nervous system, it is alive.
2. I accept that there are many cases where it is morally acceptable to end a life. (This ends your false dilemma).
3. Early term abortions don't bother me very much (this is my personal feeling). Removing a couple dozen cells from a uterine wall doesn't present a dilemma to me. (I accept that people disagree with me on this).
4. The issue for me starts when the baby develops a beating heart, and a functioning nervous system. At this point, the baby starts becoming human. When a baby starts responding when it is poked, she is able to interact to things outside of itself. At this point abortion is morally uncomfortable for me.
There is a question about what makes a baby human... to me the development of a functioning brain that can interact with its environment is a big part of this.
5. I accept the arguments about a woman's right to make decisions about her body. This is a valid point. The abortion issue involves the tension between the woman's right to make a choices about her body, and the right of the developing baby to have a chance to have a full life.
6. At some point, before birth, I believe that the baby develops enough to the point where it is human, and at this point that ending its is morally unthinkable. Unfortunately defining this point involves an arbitrary moral judgement.
My personal opinion is that this happens well after conception, but also significantly before birth. Society has developed this is idea of "viability", which is just as arbitrary as any other point.
7. The best arguments in favor of the pro-choice side... and the reason that I support a position of "safe, legal and rare" until the last trimester of a pregnancy haven't been mentioned on this thread. I find that a little odd.
People are more interested in demonizing the opposition than in presenting their most effective logical arguments.