Vasectomy: safe, convenient, effective -- and underutilized.
Vasectomy is highly effective, comparable to female sterilization and to longterm, reversible female methods such as implants and IUDs. Vasectomy is not effective immediately, however, and WHO recommends that the couple use alternative contraception for 3 months after the procedure. Risk of failure (pregnancy) is commonly quoted as from 0.2% to 0.4%, but failures rates as high as 3–5% have been reported. Failure may be due to client behavior (when alternative contraception is not used after the procedure) or may be due to technical failure from the procedure. (excerpt)