The biggest problem I have with the "It's my body, I can do what I want with it" argument is that it's inconsistent. We tell people what to do with their bodies all the time as part of law.
Even if you ignore the fact that all law essentially governs what we do with our body (i.e. murder is doing something with your body to take someone else's life), we even have laws on an internal level which govern what we can and cannot do to ourselves. You can legally be stopped from committing suicide, taking drugs, and many other internal-focused actions.
Even if you believe the harm principle (i.e. if an action does not harm anyone other than yourself it should be allowed) there's still the fact that you are harming a life that would be without your interference; one which you directly created fully knowing it could happen with your actions.
The truth is, if I had to decide where I fall on the issue, I am pro-choice. But I can still see the inconsistencies and problems with the arguments on both sides of the issue. There's nothing productive to be gained from each group sitting on their side of the fence and railing on about how they're totally right and glossing over all of the problems with their position; and make no mistake, there are problems with both sides.
The truth is, I am convinced, there is no perfect position to take on abortion. Someone gets screwed no matter what the policy decision is. It's all about building a good compromise to minimize the amount of damage done to both side's legitimate concerns. I just wish people would start talking the whole thing a bit more seriously and productively and less evangelistically.
All right and where do you draw the line? Say you have a 38yo mother, who had an abortion when she was 18 due to a misstep and here she is, 38 with failed barrier contraception (pesar, condom and the like which you can't prove), pregnant and wanting to have an abortion, because she already has children. She obviously falls into your 47% category, so you put her on trial? And then what? If she can't prove she was using a condom that ruptured you force her to have the baby and put it up for an adoption, but whoops, the baby is born disfigured and mentally ill, so nobody wants it for adoption.
What do you do?
Force the mother to raise the child?
You bring up a good point. Change the proposed law so that there's a 10-20 year forgiveness period.
That's the thing; we don't have to get bogged down by specific ideas. Everyone needs to learn to compromise on their ideals somewhat so that the country can actually conclude this issue in a healthy fashion rather than deepening the growing divide between us on all of these issues.