"i got implanon inserted in january of 2009 after i had my son. i weighed roughly 200 lbs then. i breastfed for 7 full months and lost about 20 lbs in doing so, and i had no periods at all during that time. i am closing in on the halfway point of having this in and i do get quite a bit of dark spotting and irregular periods now with cramping like i used to get when i was on no birth control. i have pmdd, so my psych doctor always has me on some antidepressant. i am on wellbutrin now and have been since october of 2009. i am now down to 148 lbs. i haven&#039;t been this thin since i was in my early 20&#039;s (i&#039;m 33). i do walk and watch what i eat, but nothing extreme, and nothing unusual. i&#039;m now getting sore breasts and hoping that the next 18 months go okay."