Vasectomy is a procedure for male sterilization. It prevents sperm from entering into the urethra and is performed with an incision or a no-scalpel method. The incision method involves numbing the scrotum with a local anesthetic and then one or two small cuts are made in the skin of the scrotum. Through these cuts, the vas deferens are tied or blocked with surgical clips. The tubes can also be closed with an electrical current before the cut is stitched. The no-scalpel method makes one tiny puncture in the scrotum. The vas deferens tubes are located via the puncture and then they are cauterized, tied or blocked. The small puncture heals quickly so no stitches are needed.