birth control
"I have had this implant for 2 1/2 years! It has never failed me. It's awesome that I don't have to try and remember to take a pill, or change a patch and so on. I have tried almost every single kind of birth control out there. This is by far the best. 
HOWEVER...depending on your body (if you are anything like me) it can also have its negative side. 
I often will go two months WITH my period. Sometimes it is so painful and I can't even stand up. Also, the have become heavier. After about 6 months I started to notice that they really were much much heavier and very unpredictable. It's a 50/50 with this implant. Take the good with the bad I guess."