It's more than biological, it's spiritual. That place between sleep and awake, the place where you can still remember dreaming: To birth a woman must go to the place between this world and the next. http://www.mothering.com/articles/the-last-days-of-pregnancy-a-place-of-in-be etween/
Translating traditional practices within a western medical framework is tough, nion impossible. This article looks at what we are trying to achieve when using a rebozo for labour, birth and beyond: is it for comfort, distraction or progress. And in turn why we need or don't need evidence always to back up those intentions, why established traditions can be trusted.