Vasectomy is a simple, effective, office-based procedure that provides a monogamous couple or individual with a permanent form of contraception. During a vasectomy, the tubes (vas deferens) that carry sperm to a man’s semen are cut and sealed. This procedure is typically done under local anesthesia in a 20-30 minute office procedure. The success rate is over 99% and the risk of complications is extremely low. It is considered permanent, so one needs be certain that he does not want to father children in the future. It can take several months after a vasectomy for all the remaining sperm to be ejaculated or reabsorbed, so another form of birth control must be used until a semen sample shows a zero sperm count.