1. Department of Health and Human Services. Coverage of certain preventive services under the Affordable Care Act. Federal Register, Proposed Rules. 6 Feb 2013; 78(25): 8456-8458.
2. Jones J, Mosher W, Daniels K, et al. Current contraception use in the United States 2006–2010, and changes in patterns of use since 1995. National Health Statistics Reports. 18 Oct 2012; 60.