According to the Guttmacher Institute, about 99% of sexually active women in the U.S. from ages 15 to 44 have used at least one contraceptive method. Not every method works or is right for every woman, and with so many choices out there, like natural family planning or hormonal birth control, you may not know what is best for you. Your OB/GYN can help determine the best birth control option for you and your partner.