“…In a non-comparative study, one-third of levonorgestrelonly implant users (mean age 18.2 years) reported weight gain with 6 months' use, averaging an increase of 3.74 kg. 139 Few etonorgestrel users reported weight gain (6.9%), yet the measured weight gain was at least 6.8 kg over 2 years. 140 Increased weight has also been noted with the levonorgestrel implant.…”