It is a quick and popular procedure (20, 000 per year in Ontario) that is performed in a doctor’s clinic with local anaesthesia in less than 15 minutes. A vasectomy prevents the sperm from entering the semen by blocking the tubes (vas deferens) that carry sperm from the testicles.
Male Anatomy: before a vasectomy.
The single site created in the skin measures 2-3mm and serves as access to both the right and left vas tubes. The divided vas tube prevents sperm from entering the semen.