Etonogestrel
"I have been on numerous birth controls, but I got a blood clot about a year ago and I am no longer allowed to be on estrogen for the rest of my life so I started on the progesterone pills and they didn't stop my period so I got this implant and I have been straight bleeding for about three months straight with no break. Not even kidding this birth control is the worst and this isn't just spotting it's heavy bleeding, I'm never happy anymore either I've had it for about five months and I'm getting it taken out to put and IUD in I can't even believe they market this as a valid birth control what woman would want such an irregular period"