Vasectomies are the most reliable method of male contraception and an estimated 40 to 60 million men worldwide have chosen to have one.  They are the most widely used contraceptive method for men looking to achieve permanent sterility for family planning or personal reasons.
The procedure should be thought of as irreversible. It has a low complications rate and failure is very infrequent. A vasectomy does not begin to work immediately and couples need to continue to use contraceptives until absolute sterility has been achieved. Vasectomies are safe and do not have any side effects or cause serious illness in the long term. It is a method that is used for avoiding pregnancy in long standing relationships but also as a personal sterility method in men who are not in a relationship (those who have separated, divorcees or widowers) but who do have sexual intercourse or, even when they are in a relationship, do not wish to have more children. […]