birth control
"I was on the shot for a year. I spotted for months at a time which didn't seem like a good trade off for no period. I also experience mood swings that I couldn't seem to control. My acne got out of control and I had break outs in areas that I didn't normally have issues with. Then to top it all off I gained about 15lbs while on this shot. To me the pro (convenience of getting one shot every three months) didn't out way the cons."