[Method] Birth control shot [Consideration] 
This method is convenient and does not require use every day or with each act of intercourse. This method requires that you see your health professional every 3 months. Side effects of weight gain and irregular bleeding may be bothersome. The shot causes mild bone thinning when it is used for 2 or more years. This is of special concern during the teen years, when young women are normally building bone strength. Be sure to get enough daily calcium and weight-bearing exercise. And discuss with your health professional your bone health and birth control options after 2 years of using the shot.