Question: what is the difference between implant and norplant?
Answer: Are Implanon and Norplant the Same Thing? Implanon (etonogestrel) and Norplant System (levonorgestrel) are contraceptive implants used to prevent pregnancy. Implanon is used to prevent pregnancy for up to 3 years, and Norplant is used to prevent pregnancy for up to 5 years. The brand name Norplant is discontinued.