Etonogestrel
"I've had the Nexplanon for a little over a month. I'm five days late, but I'm guessing that's because of the Nexplanon. I haven't had any bad side effects. Having it inserted was pretty painful, sore for about a week. But now that's it's healed I barely even think about it. As of now, I love it. Don't have to remember to take a pill every day, no period (yet). Hopefully it will stay like this."