A new study from the Guttmacher Institute find that 14 percent of birth control pill users take the pill for non-contraceptive purposes. According to the study (.pdf), 1.5 million women rely on birth control pills for exclusively for non-contraceptive purposes. The study also found “that more than half (58 percent) of all pill users rely on the method, at least in part, for purposes other than pregnancy prevention—meaning that only 42 percent use the pill exclusively for contraceptive reasons”: The study—based on U.S government data from the National Survey of Family Growth (NSFG)—revealed that after pregnancy prevention (86%), the most common reasons women use the pill include reducing cramps or menstrual pain (31%); menstrual regulation, which for some women may help prevent migraines and other painful “side effects” of menstruation (28%); treatment of acne (14%); and treatment of endometriosis (4%)