"i got my first implanon in april 2009, experienced bleeding for about a month straight but after that i was in the clear! i love not having to worry about taking a pill everyday and i&#039;d say its extremely effective since its the only form of contraception i use and i have not gotten pregnant after 3 years. i&#039;ve gained about 15 pounds over the 3 years, but think it&#039;s mostly because of college and poor choices, not my implanon. i just got my new implant, and i&#039;m excited for another 3 years of worry free birth control!"