If i've stopped having a cycle completely from the depo shot my chances are slim of being pregnant? right ? i don't have cycles but have unprot. sex

Depoprovera effect: Depoprovera is one of the most effective forms of birth control as long as you get the shot every 3 months as directed. Irregular or absent periods are an expected side effect. Failure rates are 1-3%. It works after about 7 days. Bleeding patterns vary widely from person to person. Many have no bleeding at all. Some will. Whether or not you are bleeding the Depo shot is highly effective