Why Protect the Unborn?

I noticed this new billboard not far from my house yesterday, and as I drove across Rapid City I noticed several like it and at least one exactly like it.



When I saw the picture of this, um, obviously pregnant woman, the first thought that occurred to me was, "If this is something you should be able to abort at your convenience, then why is it so important to protect it from secondhand smoke?"

I'm still asking myself that question.