Let them bleed

I've been following the anti-abortion debates in the United States with a growing sense of horror - which is why I was grateful for some light relief from The Feminist Philosophers' blog with their cartoon: The Mombies!!!
But what are these people thinking? Do they really think it's ok to sacrifice a mother's life in order not to kill a fetus, even though the fetus will probably die if the mother dies before the fetus is big enough to survive?