Daily Beast- If you’re a man frightened by the thought of getting a shot in your vas deferens to prevent unintended pregnancies, good news: Researchers in Japan may have just identified the key to creating a birth control pill designed especially for you. A team of scientists based out of Osaka University have published new research in Science suggesting that immunosuppressant drugs used for organ transplant patients could be used to develop a reversible oral contraceptive: a version of “the pill” for men. Male birth control is a sticky business. Female birth control prevents ovulation through hormone regulation but male birth control must directly alter, immobilize, or block sperm cells on a physical level. So far, some of the most promising developments in male birth control have been polymers like Vasalgel that work by preventing sperm from leaving the body in the first place. The semi-permeable gel is injected directly into the vas deferens but it can be flushed out with a second injection. This contraceptive has been successfully tested in male primates and the manufacturer is hoping to complete human trials by the end of 2015.
... But the team gettin shot up no safety 
