"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&#039;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."