Nexplanon is a highly effective method of preventing pregnancy ( less than 1:1000 women fall pregnant using this method). Nexplanon is a form of hormonal contraception (progesterone only contraception). It works mainly by preventing the release of an egg (ovulation). It is licensed to work as a contraceptive device for three years after insertion.
After this time, it will need to be replaced or an alternative form of contraception will need to be used. (The date of removal will be provided by the doctor who has inserted the device at the time of fitting)