Etonogestrel
"I've had the implant in for a little over a year now.  I remember reading these reviews before getting my implant and feeling very unsure.  I want to remind people that people are more likely to leave a review for a BAD experience than a GOOD experience.
Since getting the implant, I had one period that lasted about 3 weeks.  It wasn't bad.  Since then, no periods!  It's like a dream.  No other ill side effects - my sex drive is fine, no mood swings, and NO BABIES.  I would highly recommend trying this.  If you experience bleeding for 5+ weeks, CALL YOUR DOCTOR and they will probably remove it and recommend something else.  It won't work for everyone but it might work for you like it did me.  Just call your doc if anything feels wrong!"