"so implanon pros and cons... pros. it&#039;s hidden well and has a 99% effectiveness rate. awesome. cons. i&#039;ve had mine in for over a year now. the side effects don&#039;t hit you the first month. they slowly drag. i have been absolutely miserable with this with so many of the side effects. they&#039;re not always something you can get used to. i can&#039;t tell you how many times i&#039;ve been to the doctor within the last two months. getting this thing out as soon as possible."