Birth control implants are devices that go under a woman's skin. They release a hormone that prevents pregnancy.
Two similar implants available in the U.S. are Implanon and Nexplanon, which is gradually replacing Implanon.
Each implant is a plastic rod about the size of a matchstick. The rods contain a form of the hormone progesterone called etonogestrel.
How much effort do you want to make to prevent a pregnancy?
If you're a woman, does it matter if your period is affected?
Will you some day want to have a child?
You can compare facts about birth control methods in the sections below, including the basic ways they work.
Behavior: Something you or your partner has to do
Barrier: Goes on or in your body before you have sex to block the sperm from getting to the egg
Hormonal: Changes a woman's body chemistry. (Depending on the specific hormones, it stops ovaries from releasing eggs, thickens the mucus around your cervix to keep sperm from reaching the egg, or thins the lining of the uterus.)
Medical: A procedure that changes your body
When doctors talk about how effective a birth control method is, sometimes there are different rates when it's used "ideally" -- meaning exactly the way it was designed -- versus how the average person uses it in real life. "Typical" use takes into account that people can't or don't always use birth control correctly or consistently.
Keep in mind, out of every 100 women who don't use any form of birth control, you can expect about 85 to get pregnant within a year.