birth control
"I have had this implant for 2 years and it's great ! The longest that I had my period for was a month. But it was only really light spotting. I have not suffered any side effects except blacking out 
twice after getting it implanted. But even with blacking out I'm not too sure it was from the implant as it hasn't happened since. Now I have not had my period for 8 months and it's great !"