Etonogestrel
"I am a huge fan of the Nexplanon (formerly Implanon) and am currently on my 3rd rod. If you have heavy painful periods like I do and cannot take a pill every day for whatever reason, this is the best birth control out there. Trust me, I've tried almost all of them. The trick, I think, is getting it switched out before the 3 year deadline. Once you get to 2.5 years or so, your hormone levels get funky and you'll start having periods again. In the course of the last 7-8 years, none of my gynecologists have had any issues with switching it out early. There's no extra cost and it just makes sense. Plus, most of the "oops, I'm preggers" stories out there regarding the Nexplanon got pregnant that last year. So, it's also better safe than sorry!"