What animal gives birth through its mouth?

I've been reading about the fascinating

Gastric Brooding Frog

.

This frog lays eggs, then swallows them. A substance in the eggs stops the stomach from producing hydrochloric acid - so the eggs aren't digested - then, 7 weeks later, the eggs hatch and the babies are born through the mother's mouth!

These frogs were discovered in Australia in the early 1970's, but haven't been spotted since 1985.

Click here to see a photo: animal that gives birth through its mouth.