Etonogestrel
"I got the implant at my postpartum check up. The procedure was painless.    I breastfed my son until he was fifteen months old, and had no period after my bleeding from the birth subsided. He is now eighteen months old and I have been having a "period" that is weird heavy or at least spotting for a month and a half now. I was concerned until I read here that this seems to be happening with the majority of women. I'm going to make an appointment to get it removed. I seem to be mentally/emotionally out of sorts as well. The time period suggests that my state of mind might be related to the implant as well. It's hard to get pregnant if you never have sex (because you're constantly bleeding like a slaughtered pig and are emotionally unstable)"