"i was on the depo for a little under a year. the main reason i stopped taking it was because of the weight gain. either way, while being on the shot, my period stopped completely, which is the main reason i chose it. i just recently switched to the pill and have been bleeding during sex, which is concerning, but never happened when i was on the shot. in all, when i was on the shot i probably gained a total of 10-15 pounds, which i can&#039;t fully blame the shot for. other than that, i did not have any issues with any other side effects while i was using this form of birth control."