"when i started getting the depo shot i was 15. it was a lot easier to do that than have a 15 year old remember to take a pill everyday. the only downsides to this shot were the constant hunger and the going back to the doctor every 3 months to get another one. i did experience weight gain, but i mean c&#039;mon, if you&#039;re going to eat more, then you have to exercise more. i took it for 3 years and had not gotten pregnant. just use common sense and you will absolutely love the shot!"