"i&#039;ve been on nexplanon for a little over 2 yrs now. for the most part i think it is best form of birth control. i had a normal length period the month after i got and i didn&#039;t have another one for an entire year. when i did have another one it lasted for a little over two weeks and then i had another one a month after and that lasted around two weeks. 2 months later and i haven&#039;t had one sense. i will say that i do believe it causes mood swings because i have found myself to be extra emotional for no apparent reason. the biggest reason why i love it is because my boyfriend and i have been together for a year and we&#039;ve only used a condom twice and i still haven&#039;t gotten pregnant so it&#039;s extremely effective."