For more information on sexually transmitted diseases, try these websites. 

AIDS Alliance for Children, Youth & Families

AIDS United

amFAR, the Foundation for AIDS Research

American Sexual Health Association (ASHA)

Association of Reproductive Health Professionals

Centers for Disease Control and Prevention (CDC)

GMHC 

The Guttmacher Institute

Healthy Women

NASTAD: National Alliance of State and Territorial AIDS Directors

NCSD: National Coalition of STD Directors

National Minority AIDS Council

Planned Parenthood Federation of America