Etonogestrel
"I did not experience any weight gain, but I do have insane periods. I won't have one for a month and then 44 days later I'll have a period for two weeks. I don't really care about the random periods because I've suffered from this my entire life, but I'm coming to the end of my 3 years, and my mood swings around the time of my period are HORRIBLE. I'm emotional, and just crazy. I'm not sure if this is due to the Implanon, but its gotten severe in the past 5 months, to the point where its disrupting my life and my relationship. I loved the Implanon except for these past 5 months. VERY effective form of birth control, but not so great at stopping the periods."