"i&#039;ve had implanon since december 2011. i am getting it replaced in a few days. the first 2 years i didn&#039;t have problems with it. my periods weren&#039;t crazy. i think i had it about every 3 months for 3-4 days normal bleeding. however for the past few months i have had it every 2 weeks like clockwork with heavy bleeding. my doctor told me it is just because when it runs out it runs out and my hormones are just out of wack. i have gained weight (10 lbs in 3 years) but i&#039;m not blaming that completely on birth control. i&#039;m in dental school and quite stressed. for those who say they have gained 20-30 lbs on this, there is no way hormones alone cause that much weight gain, other factors are in play there."