 Sterilization is the most common form of contraception in the United States when female and male usage is combined.However, usage varies across demographic categories such as gender, age, education, etc.According to the Centers for Disease Control and Prevention, 16.7% of women aged 15–44 used female sterilization as a method of contraception in 2006–2008 while 6.1% of their partners used male sterilization.