Vasectomy is a form of male birth control that cuts the supply of sperm to your semen. It's done by cutting and sealing the tubes that carry sperm. Vasectomy has a low risk of problems and can usually be performed in an outpatient setting under local anesthesia.Before getting a vasectomy, however, you need to be certain you don't want to father a child in the future. Vasectomy is considered a permanent form of male birth control.Vasectomy offers no protection from sexually transmitted infections.