Two 15-minute tickles could be the future of male birth control. New research on rats indicates that currently available ultrasound machinery could be used to kill off sperm-growing cells, technology that could render males infertile.

By rotating high-frequency ultrasound around the testes, scientists find they can kill most sperm-creating cells in rats. Two 15-minute sessions, two days apart seem to be the most effective rendering male rats infertile.

Full story at Discovery News