Chinese researchers are using testosterone injections as a form of male birth control and it seems to be working. USA Today reports that the results will appear in the June issue of the Journal of Clinical Endocrinology & Metabolism. More work has to be done and long-term side effects needs to be teased out but the regimen looks promising. Word has it that many Major League Baseball players are very interested in this type of contraception. It's not that they want the testosterone injections to hit the ball farther but they just want to control the planet's population (and hit the ball farther).