Etonogestrel
"I got my first Implanon at age 25 after the pill (many versions of it) failed me miserably for years in terms of side effects. I opted for Implanon because the hormones/chemicals are so different from the pill, so I was hoping for at least different side effects. Honestly I'm very happy with the Implanon and I've had it for 5 years now. It's done its job of preventing pregnancy perfectly.

As for side effects - there are side effects to ALL medication containing hormones, there are simply no exceptions, your hormone levels influence your moods, weight, appearance, everything. There's no way around side effects. I've had long periods and a bit of weight gain, that's it. I can deal with that better than with a baby so hey, I win."