birth control
"After I had my son, 6 weeks later I got the implant. I thought it was a great idea. (I have always been fit and was able to lose weight with no problem). After the implant, I bled for 3 months STRAIGHT. Doctor said this was normal. It eventually died down. During those 3 months I also gained 30 pounds! I would work out 6 days a week, health diet. I have lost nothing. I bleed for months at a time. Horrible cramps and headaches. So moody. And tired. I'm not pregnant though. 
Needless to say, the implant will be removed in a few days after having it for 2 years. 
Use at your own risk. Works for some, but not all. Good luck. Hope this helps."