Etonogestrel
"I used to suffer from frequent migraine headaches associated with a spike in monthly estrogen levels, Implanon helped me to have fewer headaches. The doctor who performed the implant didn't really numb up the area enough because there was pain associated with the little tube going in. It didn't last that long though, but left a pretty nasty dark red bruise for about a week and was tender for about a month. Internally I feel great. There are no mood swings and menstrual cramps last about a day. My sex drive is normal. The only thing that I don't like is that I almost always have the dark "end of your period" discharge. For three weeks out of the month I have this brown sludge, but it's worth it because I won't get pregnant for three years!"