The procedure surgically cuts and ties off the vas deferens, the tubes that carry sperm from the testicles to the penis.
Sterilization is a serious decision that is made voluntarily.
Anyone considering this should be well informed and understand that it is permanent, and yet not totally 100 percent effective. Each method has a small failure rate that needs to be understood. Be sure you understand the process, risks, and alternatives before going ahead with a permanent method. It may be worthwhile to talk to friends who have had vasectomies and ask about their experiences. If you are absolutely certain that you do not want children in the future, sterilization is an excellent option.