"i&#039;ve tried 5 different birth control pills before trying the depo-provera. there&#039;s no estrogen, so i don&#039;t get moody or sensitive. i also didn&#039;t gain any weight at all and was able to go back down to my normal body weight that i was prior to taking the pill version of birth control. the only side effect i feel is a little bit of soreness in my hip after the injection, but that&#039;s to be expected. the one complaint i have is that you&#039;re only able to stay on it for 3 years. i&#039;d stay on it until i wanted to be pregnant if they would let me."