Bahamondes L, et al. - The authors sought to determine weight changes in women randomized to either the etonogestrel (ENG)- or the levonorgestrel (LNG)-releasing contraceptive implants and to compare with users of the TCu380A intrauterine device (IUD). They observed small but significant weight increase among ENG- and LNG-implant- as well as among IUD-users; however, it had little clinical significance during the three years of follow-up. It was noted to be slightly higher among implant- than IUD-users weighing > than 50 kg.