The implant is a thin, plastic rod about the size of a match-stick that is inserted beneath the skin of the upper arm. It contains the hormone progestin that stops ovulation (prevents the release of an egg from the ovaries). It can also stop the sperm from entering the egg. It is sold by the brand name Implanon™.
How to use an implant
A trained health care provider has to insert the implant under the skin (it only takes a couple minutes). It can be left in for up to 3 years (a trained health care provider has to remove it).