"i have had nexplanon for about a year and a half now, the first six months i spotted off and on and was a little moody. have had a bit of weight gain but i couldn&#039;t say for sure if it has been from the birth control haha i didn&#039;t have any issues with implantation, healing, or the effectiveness so far. i intend to get another one out in after the three years are up.  however i never plan on having children. but i haven&#039;t had any issues or scares at all. i&#039;ve loved it. my periods have gone away completely i have no more spotting. it&#039;s great"