… law that requires women to undergo an invasive vaginal procedure before they can have a legal abortion.

The above could be re-worded to read less emotionally thus:

… law that requires women to undergo an invasive vaginal procedure before they can have an invasive vaginal procedure.

And then to be consistent you could also show an image that depicts the invasiveness of the abortion.

Don’t get me wrong, I’m completely in favor of 100% legal abortion, I’m just not in favor of emotive arguments. But if we’re going to use emotive arguments in favor of abortion, I just say what could be worse for a child than being born to parents who do not want you?