An estimated 10.7 million American women use oral contraceptives, the leading method of contraceptive in the United States. The Patient Protection and Affordable Care Act now requires coverage of FDA-approved contraceptive methods for women at 100 percent, without charging a copayment, coinsurance or deductible, when filled at a network pharmacy. HHS commissioned an Institute of Medicine study to review what preventive services are necessary for women’s health and well being and should be considered in the development of comprehensive guidelines for preventive services for women.