"i&#039;ve had my nexplanon implant for 2years, it does exactly what it is supposed too. i haven&#039;t had any mood swings, i had zero menstrual cycles since implantation and i have not gotten pregnant in the past two years. definitely a great solution for birth control. but the only con i have, is the weight gain. i&#039;ve gained at least 25lbs the past year, the first year i did not experience any or much weight gain. the 2nd year on nexplanon is when i had this drastic weight gain and i&#039;ve done everything, i&#039;ve changed my eating habits, regular in gym and i can&#039;t lose any weight! i&#039;m planning on taking this implant out and finding an alternative so i can try to lose this weight."