birth control
"I had implant from April 2011 to June 2013.  The first year could not have been better, no weight gain, no period whatsoever, no spotting, no moodiness, nothing! It was just so perfect! March 2012 I instantly gained 15 pounds and had a period that lasted almost 2 weeks.  I thought it was water weight and a long period because I hadn't had one in almost a year. My horrible periods became unbearable in May 2013.  I would soak through super plus tampons in 2 hours, and this lasted 2 weeks. If it had stayed like it was the first year I'd still be on it, but everything changed after about a year. So that's why I give this a 5."