The problem with a law like that is how can someone right of choice supersede the right to life.
Let me help u out here....president bush signed into federal law a unborn victims of violence act, which was inspired by the scott peterson murders, and recognized the legal right of a fetus in commission of a crime. Thats key. Abortion is not a crime and is protected by law, despite ur moral objections to it.
Ironically, ur question is the exact same concern that pro choice advocates had about the federal law....if fetuses are granted legal protection, then how can roe v wade stand? The law is explicit that a crime committed against a woman, changes the definition of the fetus. Kinda Like how the same pills that are legal with a prescription, become illegal without one.
Basically the law was established to prevent cats from harming pregnant women, in order to get out of a pregnancy