Hi ,
Looks like as it runs out it puts you hormones out of wack !
http://www.drugs.com/comments/etonogestrel/implanon.htmlFor Birth Control: I've had Implanon since December 2011. I am getting it replaced in a few days. The first 2 years I didn't have problems with it. My periods weren'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'm not blaming that completely on birth control. I'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.
