birth control
"I had Implanon inserted in September of 2009.  So far, I have been very happy.  I had frequent periods (every 2-3 weeks for only a couple of days) for the first 3 months.  Since then I haven't had my period and not even symptoms of it.  That part has definitely been great.  I did feel it made me pretty moody for the first 2-3 months but has tapered off.  I haven't experienced any weight gain as some have reported.  I have a pretty high activity level (running about 20 miles per week) and have been eating as I normally do.  The most major side effect I have is a decrease in sex drive which is a pretty big downside but considering I haven't experienced other side effects I rate this form of birth control highly."