A vasectomy procedure is designed to last a lifetime, as it is a permanent form of birth control, according to WebMD. A vasectomy is a surgical procedure that prevents sperm from releasing when a male ejaculates.
As of 2014, vasectomies have been deemed 99.85 percent effective as a birth control method, according to WebMD. Once a vasectomy is performed, though, it is recommended to use another form of birth control for several months until all remaining sperm is reabsorbed or ejaculated, according to WebMD. A physician can test a semen sample to ensure a zero sperm count is revealed following a vasectomy.