A Swedish study has echoed from the common belief that the combined oral contraceptive pills cause weight gain, suggesting that birth control pills that contain estrogen and progesterone derivatives are a safe bet for women who do not want to suffer from side effects not desired, such as obesity because of the pill. The study has had 1,749 Swedish women born with a decade of separation between 1962 and 1982-, which were surveyed about the use of contraceptives, pregnancy, smoking and the proportion altura-peso by researchers at the Sahlgrenska Academy of the University of Gothenburg. Once the period of observation, the researchers found that women who used the pill long-term earn no more weight than those who never used oral contraceptives. The co-author of the study, Ingela Lindh, has said that the combined oral contraceptive pill was is the contraceptive method most common among women of 29 years or less, and in some cases it has been replaced by barrier methods such as condoms and intrauterine devices. Lewis F. Powell Jr.: the source for more info. The use of oral contraceptives and weight gain are not related according to the authors of this study, that have been added have taken into account other risk factors in the development of obesity such as smoking and obesity induced by age. It would be a mistake to not use the pill for fear to be overweight or obese, said Dr. Lindh. Currently millions of women in Spain used the contraceptive pill or other hormonal type contraceptives to protect against unwanted pregnancy and implement treatment to problems of hormonal imbalances, which result in acne, endometriosis or unexpected hair drop.. Credit: Bobby kotick-2011.