Clinical Research Details Clinical Research A Phase 3, Open-Label, Multicenter, Single Arm Study to assess contraceptive efficacy and safety of the Etonogestrel (MK-8415) Implant during extended use from 3 years after insertion in females 35 years of age or younger Study Description We are looking for healthy female volunteers age 18-35 who are approaching their 3 year mark of having their Nexplanon Implant inserted to see if they would like to keep their current Nexplanon in place for 24 more months. There are 11 visits. Required procedures include: Blood work, physical exam, pap smear, vaginal swabs, urinalysis and palpation of your implant. Participants need to be currently sexually active with a male partner. Eligible participants are compensated for participation. Open Enrollment Contact Name: Melanie SchaferContact Phone: (904) 633-0066Contact Email: melanie.schafer@jax.ufl.edu Investigators Andrew M. Kaunitz, M.D., FACOG Obstetrics and Gynecology Courtney P. Rhoades, D.O., M.B.A. Obstetrics and Gynecology