Depo-Provera
"I was on the Depo for about 2 1/2 years, and after some initial spotting (about 9 months) I loved it. Super easy, nearly painless, very effective. If it weren't for the bone loss controversy, I'd still be on it. I didn't notice any side effects, my period was replaced by light spotting about 3 weeks before I was due for my next shot."