This is a small flexible rod (40mm long) put under the skin of the upper arm which releases the hormone progestogen to control fertility. It's inserted by a trained professional, such as a doctor, and lasts for three years.
The implant stops the release of an egg from the ovary, and also stops the sperm and egg from surviving in the womb.
If implanted correctly, it's more than 99% effective, one of the most effective contraceptive methods available.
As it lasts for three years, it's very useful for women who know they don't want to get pregnant for a while. Once the implant is in place, you don't have to think about contraception each day or each time you have sex. It doesn’t interrupt sex and it works straight away after being fitted.