Abortion is like Slavery

I had this thought the other day that might shed some new light on the abortion debate. What are pro-choicers in favor of? The woman's right to choose what happens to her own body, right? But the "fetus" inside her is not her own body; it is a different body altogether. If it were just a part of her own body, then all women would walk around with fetuses inside them, not just the ones who are about to give birth to a baby. So basically, when a woman ends a life that grows inside her, she is saying in a sense that that life is hers, that she owns it. What do we call it when one human owns another? Slavery! And if women own their own children, then we should have let Andrea Yates and all the other child murderers out of prison! So if we are in favor of abortion, we are in favor of slavery as well. You can't take one and leave the other.

(Let me know what you think.)