Etonogestrel
"I had Nexplanon inserted on 2 Sept 2013 and its the first method of birth control I've tried. I'd read where it is the most reliable, so went for that option. No pain during insertion or afterwards. Only had a period the first month and nothing since then which feels a little odd but is also bliss! Completely forget it's even in my arm most of the time, however my moods are horrendous, I cry far more than I ever used to, I snap at people and I never used to, I feel very anxious or conscious and often feel exhausted. I don't know if these are side effects of Nexplanon as I'm in my final year at uni so it could be stress etc., but I'd imagine it is the increased hormones. All in all I'd say I've had a good experience most of the time."