Nope! The point of the bumper sticker was that SHE wouldn't be able to be holding up HER little (my Mom is Pro-choice) sign if her Mama hadn't been 'Pro-Life' in making the decision to give birth to her!
I know that "SMILE: Your mom was pro-life" is a popular slogan, but I've always thought it very weak in reasoning. That is, countless pro-aborts that have given birth to children. Just because people like Whoopi and Madonna have given birth occassionally (in between abortions) it doesn't make them pro-life. I'm sure they laugh at the very idea.
Well, the fact that her mom was pro-choice and the fact that she is, in fact, holding up her "little sign", proves that your bumper sticker doesn't have its facts straight.
You seem to be confused about what "pro-choice" means exactly. It doesn't mean pro-abortion, it means exactly what it says: Pro-CHOICE.
And what you didn't seem to get is that the woman holding up the sign was trying to tell you that her mom CHOSE to give birth to her, because she's pro-CHOICE. Get it?
Now you can mince semantics all you want, but that doesn't change the fact that people who are pro-choice want nothing more than the freedom to choose, and that includes the choice to have as many babies as they want to have. I am pro-choice, despite the fact that I couldn't even fathom having an abortion.
I'm not trying to change your convictions. But you should at least understand what your opponents' convictions are, if you're going to make an intelligent argument against them. Otherwise, you end up looking like a misguided bumper sticker.