How does implanon work?

Stops ovulation: Implanon is an implantable contraceptive system that uses pellets implanted under the skin to deliver hormone that inhibits ovulation much like a pill or a shot would do. It lasts much longer than oral and injectable methods making it more convenient for some.

Implanon works by: An implantable form of birth control, Implanon provides very effective (99.95%) birth control for at least 3 years. It is usually implanted under the skin in the upper arm. Implanon contains the hormone, etonogestrel (progestin) , which is slowly absorbed into the body over a 3 year period. Etonogestrel causes a woman's body not to release eggs from the ovary, thus there is no egg to fertilize.