http://opa.osophs.dhhs.gov/pubs/publications.html
Office of Public Health and Science, U.S. Department of Health and Human Services-OPHS
The Office of Population Affairs (OPA) Clearinghouse distributes information on family planning, adolescent pregnancy, abstinence, adoption, reproductive health care, and sexually transmitted diseases, including HIV and AIDS. At this time, publications are only available in Adobe (.pdf) file format.