"9 months in: the first period that i had on implanon was about 2 wks later than expected and lasted about 2 wks long. since then all of my periods have come within about a wk of when i would have expected them. each period has been shorter in length, as well as lighter. (usually there are only about 2 days of bleeding that are really noticeable but the other 5-8 days are just spotting on and off). i look forward to the day when it is just a few days of spotting, or less.
as far as other side effects go: i have maybe one bad headache every other month. i noticed no weight gain until recently (which is probably due more so to the holidays than the implanon!). i do have a lot of acne, especially on my chest. despite these negatives, i like it!"