In the 2007 Thai gross-out horror flick Sick Nurses, a vengeful ghost takes revenge on a gang of evil, organ-harvesting nurses who killed her.
In one particularly harrowing scene, a nurse ends up sawing off her jaw so that a fetus in a jar can shimmy down her throat. It's revolting!
According to our tipster Apinja, Sick Nurses ain't that great but "if the movie had been all about the baby/no jaw scene then it would have been a solid 10." It's the kind of movie that ends with a lady giving birth to a full-grown spirit. Indeed, this would make a perfect doubleheader with that hilarious Hong Kong spirit-on-zombie sex classic, Seeding of the Ghost.