As the name suggests, long-acting reversible contraception is effective birth control that lasts a long time and can be easily reversed. Most oral contraceptives would be close to 100% effective if we weren't human, and we could remember to take things at exactly the same time every day and never forget anything. But unfortunately, with real-world usage the numbers are more like 91% or 92%. That’s where the concept of long-acting reversible contraception comes in. It takes out the possibility of human error.