"i&#039;ve been on the shot for 2 years, i&#039;ve experienced no weight gain or any of the other common side affects. i have not had a single period and only spotted one time. i started the shot when i was 16, and now that i am 18, i want to change methods because it is recommended to not be on the shot for over 2 years because it can lead to osteoporosis. i have tried other methods before, such as the patch and the ring. but the shot was my favorite of them all. if i didn&#039;t have to switch methods, i would definitely stay on the shot."