Based on an ancient papyrus document, Egyptian women urinated on wheat and barley seeds to determine if they were pregnant or not, according to the Office of History in the National Institutes of Health. If wheat grew, it predicted a female baby. If barley grew, it predicted a male baby. The woman was not pregnant if nothing grew. Experimenting with this seed theory in 1963 proved it was accurate 70 percent of the time.
There are no pain receptors in the brain itself. But he meninges (coverings around the brain), periosteum (coverings on the bones), and the scalp all have pain receptors. Surgery can be done on the brain and technically the brain does not feel that pain. With that said, the brain is the tool we use to detect pain.