@KoiwiGal - I'm pretty sure this is the test that they have tried to legislate to force women who want an abortion to take it before they can have the procedure. It can be extremely humiliating for some women and that's bad enough, but when someone is getting an abortion because they have been raped, this is basically replicating their hideous experience.
And it sounds like there is no need for it to be done. An ultrasound machine can be used in other ways, like through the bladder. It's basically just being used as a way of trying to make them change their minds, or to punish them for considering that particular course of action.