Over 1.2 billion adolescents - one person in five - are making the transition from child-hood to adulthood. How well we prepare them to face adult challenges in a fast changing world will shape humanity's common future. Adolescents must be enabled to avoid early pregnancy, sexually transmitted infections and HIV/AIDS while being given skills, opportunities and a real say in development plans, stresses The State of World Population 2003 report by UNFPA, the United Nations Population Fund.