I have no idea. Perhaps there's a state law forbidding it after a certain time frame. That may be way off base, I just don't know. The article does say what you mentioned, that she had a right to one.
I don't get it. I don't know too much about abortion law, but I was under the impression that abortion can only be performed in the first trimester. Given the fact that she was into the fourth month of her pregnancy, hadn't she already lost the right to an abortion?
She did have an abortion. It just wasn't performed in a medically accepted fashion, and it wasn't performed by a licensed practitioner.
At worst he should have been punished for practicing medicine without a license.