birth control
"I never got my period regularly, but I once I started taking this I stopped getting it altogether. No joke, I gained over 50 pound in the year and change I was on this, and I can't attribute more than maybe 5 or 10 pounds to lifestyle changes. I went from an A/B cup to a D cup as well, and towards to end I was exhausted 24/7 and sleeping up to 18 hours a day. I can't say much about what changes once you stop as I've only been off of it for a week or so now. I take other medications too, and this was the first birth control pill I'd been on, so I wasn't sure at first if the birth control was the one causing all this for a bit, but I'm fairly certain it is now."