Sexually transmitted infections (STIs) are spread by
sexual contact involving the genitals, mouth, or rectum, and can also be spread
from a pregnant woman to her fetus before or during delivery. STIs, which
affect both men and women, are a worldwide public health concern.
Birth control implants are devices that are inserted under women's skin. They release a hormone that prevents pregnancy.
Two similar implants available in the U.S. are Implanon and Nexplanon. However Implanon is gradually being replaced by Nexplanon.
Each implant is a plastic rod about the size of a matchstick. The rods contain a form of the hormone progesterone called etonogestrel.