Implanon, an implanted contraception for women, has been approved by the US FDA. Press release by the company. Implanon is a rod that's described as the size of a matchstick, implanted in a women's arm (like norplant) and releases hormones constantly. It has been approved in other countries for a while. The same company that makes the Ring (just approved in Australia) makes Implanon, and it is spinning off its pharm practice from its other chemicals practice.