Etonogestrel
"I got Implanon in May last year. It's March now. Since then I've had periods every 7 to 14 days. It's weird. I do not like Implanon and am getting it taken out finally. I also have acne, mood swings, and bloating all the time because I'm constantly on my period. My sex drive has also gone way down most likely because I have chronic headaches all the time. However, that may be for a different reason, but it is one of the side effects. The nice thing about it is you don't have to worry about getting pregnant or taking pills everyday, but I can't tolerate something that affects my body so much. Some people like it however. Unfortunately it hasn't worked for me so I am getting an IUD which doesn't have any hormones."