The answer is YES. However much, the drug companies may deny, most of the women, who have birth control pills experience weight gain. They really need to combat this through strict diet and exercise. These pills have estrogen which stimulates renin angiotensim compounds in the kidneys. This leads to water retention. These pills also increase the insulin levels. As a result the energy from carbs is stored as fat cells in the body. Your metabolism is reduced and the appetite is increased. Sometimes, even if you are on a very controlled diet plan, you are unable to shed weight because these contraceptive pills hamper the weight loss.