birth control
"I went on Implanon after being on birth control pills for 4 1/2 years.  The first two months were horrible for me - I had a really heavy period for 1 1/2 weeks (normally, my periods are light and 3-4 days).  I was moody and I gained about 4 pounds even though I did not change my eating habits.  I got  a second period about two months after I had it put it, which was a little heavier than normal but only lasted 5 days.  Since then, all side effects have disappeared, I lost the 4 pounds I gained (without changing my eating havits) and I'm completely satisfied with my Implanon implant.  I have not had my period since the one I had two months after insertion, which is a bonus. I have had the implant in for about six months."