Etonogestrel
"I would not recommend this to anyone. When it came to putting it in I'm told it's nothing more than a small pinch. I couldn't use my arm for 3 days from the intense pain of getting it inserted. Then I'm told it will help regulate my period, we'll that couldn't have been farther from the truth. Periods lasting 12-14 days cramps and all, and spotting the rest of the month almost completely non stop for over 18 months. Then I finally give up and have it removed. It's only then that I'm told the longer it's in the harder it can be to get back out. The doctor ends up spending 25 minutes digging around trying to get ahold of it. Day 5 of severe arm pain."