Warning: This article contains a graphic photograph of a woman in labour. For anyone who hasn't had a baby, the process of giving birth is something of a mystery.

Neandertal birth canal shape and the evolution of human childbirth. Proceedings of the National Academy of Sciences, 2009; 106 (20): 8151 DOI: 10.1073/pnas.0812554106 ...

When transferred in a later cycle, it led to a healthy, full-term pregnancy and the birth of a baby boy. This isn't just a one-off story, either.