Share Photo: (Photo : Pixabay) Vasectomies are one of the most popular methods of sterilization for men. And for good reason - they are a simple outpatient procedure, often done right in the doctor's clinic, with minimal downtime. For a man who know he does not want more children, a vasectomy offers a form of birth control with a high track record of effectiveness. It is also a very safe procedure. How Does a Vasectomy Work? The procedure works by permanently disrupting the flow of sperm from the testicle to the ejaculatory ducts within the prostate gland. With time, the production of sperm within the testicles gradually slows down and is reabsorbed by the body.