• First website on Sexual Health:
  http://www2.hu-berlin.de/sexology/TELE/html/october_2004.html
  http://www2.hu-berlin.de/sexology/GESUND/ARCHIV/BSpeech/index.htm
  
  
• ABC Sexologia:
  http://www.abcsexology.com
  
  
• Program in Human Sexuality:
  http://www.med.umn.edu/fp/phs/phsindex.htm
  
  
• International Journal of Transgenderism: Official Journal of HBIGDA
  http://www.symposion.com/ijt/
  
  
• International Association for the Treatment of Sexual Offenders: http://www.medacad.org/iatso/
  
  
• Sexuality Information and Education Council of the United States: http://www.siecus.org

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• The Kinsey Institute:
  http://www.indiana.edu/~kinsey/
  
  
• SexHealth:
  http://www.sexhealth.com
  
  
• Sexual Health.com:
  http://www.sexualhealth.com

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• Go Ask Alice: Colombia University's Health Education Program:
  http://www.goaskalice.colombia.edu

• Program in Human Sexuality
  http://www.med.umn.edu/fp/phs/phsindex.htm

• Harry Benjamin International Gender Dysphoria Association: http://www.hbigda.org

• International Journal of Transgenderism: Official Journal of HBIGDA
  http://www.symposion.com/ijt/

• International Association for the Treatment of Sexual Offenders: http://www.medacad.org/iatso/

• International Academy of Sex Research:
  http:// www.iasr.org

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• Archives of Sexology:
  http:// www.sexology.cjb.net

• The Religious Institute on Sexual Morality, Justice, and Healing: http://www.religiousinstitute.org