Apparently theres njo sure answer as everyone reacts differently to the bc pill they may be taking. What can make one women gain 20 pound, can make another lose pounds. Just because a friend/relative/parent etc gained a lot of weight with a particular type of pill or depo, does not mean you necessarily will. Its all really just about trying which one works best for you with the least amount of side effects, and besides, most weight gain is normally attributed to fluid retention. Good luck