This is probably kind of weird, but that girl is wrong and I wanted to clear it up here rather than in the community: "A recent review of clinical studies involving different birth control pills showed no proof that birth control pills actually cause an increase in weight." This is correct and any gynocologist will tell you the same. I also wanted to defend Seasonale because it is really liberating not to have a period every month and is also as healthy as any other birth control pill has been proven to be. "Taking Seasonale maintains the lining of the uterus and avoids buildup. Since the lining is thin and does not need to be shed each month, there is no need for a monthly pill period." So there you go.