It’s fair to say that growing new life is rarely easy. For humans, it involves a lengthy stay in the womb before being squeezed out through the vagina – an amazing, but painful feat. Some other species have rejected the genitals as a means of delivery, however. Just take a look at gastric-brooding frogs. The rest of this article is behind a paywall. Please sign in or subscribe to access the full content.

How do gastric-brooding frogs give birth?

Gastric-brooding frogs incubate their eggs in their stomachs, as the name suggests. Doing so involves neutralizing the acid that usually sits in there to help digest their food, and ends with fully-formed froglets hopping out of the mother's mouth. That's right, she voms them into existence.

"The gastric brooding frog swallows externally fertili

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