Long-acting reversible contraceptives (LARC) are methods of
birth control that provide effective
contraception for an extended period without requiring user action. They include injections,
intrauterine devices (IUDs) and subdermal
contraceptive implants. They are the most effective reversible methods of contraception because they do not depend on patient compliance. So their 'typical use' failure rates, at less than 1% per year, are about the same as 'perfect use' failure rates.