birth control
"I was on the shot for a little over 3 years I gained a total of 5 pounds being on the shot.  I got off the shot because it was ruining my teeth!  It had been awhile since I went to the dentist but when I went I was told I had 17 cavities. I was shocked! I bush my teeth everyday, I may not floss like I should, but 17? That's not the worst part thought after they fixed all my teeth I go back a month later for a cleaning to find out I had gotten 7 more cavities.  How does this happen within a months time?  I finally realized it was the Depo-Provera after actually reading the paper the doctor gives you every time you get the shot."