"i&#039;ve had nexplanon for 11 months. what has been most noticeable is that my period won&#039;t come for 4 months, and then it will last for 2 weeks, heavy at first then lingering forever. what wasn&#039;t as noticeable was my acne spreading all across my back and down my buttocks. until one day you just realize- that wasn&#039;t there before nexplanon. also, not as noticeable at first- i&#039;ve gained weight steadily. i now weigh 18 pounds more than i did when i first got it and can only fit in one pair of jeans. because of the acne and the weight gain, i&#039;m having it removed in a few weeks."