"all was well for the first year and half. then, it seems, my hormones got way out of wack due to the synthetic hormones being released by the implanon. i now have excess androgens and not enough progesterone. i gained 20 lbs (on a naturally thin, 5&#039;4&quot; frame) and, even worse, cystic acne (on formerly clear, normal skin)! i had implanon in for a total of 26 months. i&#039;ve recently made the switch to a copper iud and my hormones have not yet balanced out. i&#039;m giving this a 4/10 because i didn&#039;t get pregnant and i didn&#039;t have side effects for the first year or so."