Etonogestrel
"I got the implant now over 6 weeks ago and unlike other reviews I've read I haven't had any weight gain or mod swings but my cycle is horrible!! For the last 4 weeks is been a constant light flow. My normal cycle usually lasted no longer than 5 days varying from light to heavy to light. I've heard it's normal for the first four months to allow your body to adjust but if this cycle doesn't end soon I'm not waiting the 4 months."