Long-acting reversible contraceptive use among teens prevents unintended pregnancy: a look at the evidence

. Although failure rates with perfect use can be very low, contraceptive methods that require a woman to remember to take medications, return to a clinic for an injection or secure refills result in typical-use failure rates that are much higher. For example, failure rates for the commonly used oral contraceptive pill (OCP) and depomedroxy progesterone acetate injection increase from 1% when used perfectly to 6–9% in real-world use