Etonogestrel
"So I've have the implant for around a year and a half now and I'm so over it. So far I'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'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't forget to take it but the cons definitely out weight the small benefits"