Etonogestrel
"Going on my second year. I bled consistently for the first 3 months, then my period would come every other month, alternating being super light or morbidly heavy.  The first full year I would get painful menstrual cramps, whether I was on my cycle or not. Since I have started my second year I have noticed that my cycle has started and not left. I've been on my period for two months. The first month was really light, but lately the volume has increased significantly.  I will note that I have Graves Desease which makes my hormone levels naturally very high and I think that's a factor."