"i have had my implanon for 2 years now. i got it at my 6 week postpartum check up. i didn&#039;t get my first period until over a year into having it (my baby was 17 months old when i got my first period). the cramps have been awful, periods are super unpredictable- for example i had a 4 week period, then nothing for 5 weeks, then 4 day period, nothing for 2 weeks, then 6 day period. i have had a terrible time losing weight, i haven&#039;t gone back down to my pre-pregnancy weight despite eating healthy and working out. i have headaches on it, mood swings, low energy but other than that it&#039;s great. it has done it&#039;s job- in that i haven&#039;t gotten pregnant while on it so i give it an 8."