I started on the Depo Provera(sp?) which is the injection you have once every 11 weeks, I had absolutely NO side effects and my period stopped pretty much straight away but you can only be on it for so long so I had to change last year and had the implant put in which I think lasts 3 years? I have no idea, how bad is that!? Haha! You can have the implant removed at anytime and apparently your periods and everything go back to normal pretty much straight away. The only side effect I THINK I've had from the implant is spot breakouts but it could be from my atrocious diet too!! Don't believe too many of the horror stories about these methods, not saying people don't have the odd side effect but I do think people focus on the negative and psychologically bring on/make side effects worse. Remember, people are quick to spread bad news rather than good news! Ive been on both methods and have had NO problems at all, only good things like er, NO PERIODS haha! I personally can't recommend either of these methods enough! They have been a god send and I've saved myself a fortune in sanitary products and pain relief, ha!