"so i&#039;ve have the implant for around a year and a half now and i&#039;m so over it. so far i&#039;ve had horrible weight gain, at least a stone, with no lifestyle changes. i also now have constant mood swings and periods at least twice a month! i never had a period for almost 6 months when it first went in, now i feel i&#039;ve hardly been off my period for a year. sometime it can last almost 6 weeks and gives me extremely bad migraines. however i will say it has done its job in that in not pregnant and i can&#039;t forget to take it but the cons definitely out weight the small benefits"