There are three types of long-term pregnancy prevention methods, all of which work for several years or more. One kind is the implant; this method can be used for three years.
The second kind is called an intrauterine device (IUD), and can be used for five years or more, depending on the type. Both the IUD and the implant are very good methods for teens who do not want to become pregnant for a while. However, if a teen gets one of these methods and decides she doesn’t want to keep using it, she can have the method removed at any time.