Sterilization is the most effective, and one of the most widely used contraceptive methods available worldwide. It is often the best contraceptive choice when desired family size has been achieved. Both tubal ligation in women, and vasectomy in men, are one-time procedures that are safe, inexpensive and relatively straightforward to do for a trained person. Sterilization does not require constant use of a contraceptive method, regular visits to health facilities or repeated expenditure on contraceptive supplies. Although sterilization procedures usually demand a greater investment in skill, training and equipment than temporary methods of contraception, they provide lifelong protection against pregnancy, and are therefore more cost-effective. Since voluntary surgical contraception (VSC) procedures are almost always irreversible, clients require effective counselling before making any decision.