Etonogestrel
"I have had Implanon for almost 6 months now and I am considering taking it out. My periods are frequent (twice a month) and last about 5-7 days each. In the past, my periods were once a month, lasting about 2-4 days. I have no sex drive what so ever and have experienced severe mood swings, migraines and weight gain. Since I had the birth control inserted, I have gained about 10 pounds and I was prescribed daily medication for my migraines. In-between my periods, I spotted a lot and even had a 17 day period several weeks after having it inserted. 

This birth control method seemed to be the best fit for me at the time but after several months of having it, I think I made a mistake. I would much rather take a pill every day."