Etonogestrel
"I got mines inserted in February 2016. I was excited about the weight gain since I'm slim and had lost a few pounds but my weight is stable. No acne breakouts, mood swings, best of all no PERIODS!! after insertion my period left and about 3 months later I spotted for 3 days and nothing since. No nausea like the pills, no vaginal wetness like the ring, no aches in bones like depo... I love it! Sorry for those dealing with bad experiences."