"i just recently had my 2nd implanon inserted. i got the first one done in october 2007 and had it taken out november 2010 and a replacement put right back in. since i have had it in my arm, it is still sore a week later and sometimes feels like it is poking me...sharply. i am hoping this goes away soon. with the first one i didn&#039;t have a period for first 2 years and then had maybe 4 a year after. i didn&#039;t have really any side effects. although sometimes i can be irritable a little more easily. it has kept me from getting pregnant for sure. i have 3 kids all conceived on birth control so this is the first to have worked. "