The implant, like Nexplanon and similar types, is a tiny rod about the size of a matchstick that a doctor puts under the skin of your upper arm. You’ll get something to numb the area first, so it doesn’t hurt. Once it’s in, you usually can’t see it.
This implant releases a hormone called progestin which helps prevent pregnancy. It mainly works by making the mucus in the cervix thicker, which makes it tough for sperm to meet an egg. It’s approved by the FDA to prevent pregnancy for up to three years, although studies show it can work for up to five years. If you decide you want it taken out sooner, you can do that too.