This document discusses adolescent sexual and reproductive health (ASRH). It defines adolescence and explains the physical, emotional, and developmental changes that occur during this period. It identifies key health problems faced by adolescents like early pregnancy, sexually transmitted infections, and mental health issues. It stresses that adolescents need information, skills development, supportive environments and access to health services to grow up healthy. Finally, it argues that governments and societies should invest in adolescent health and development due to demographic, public health, economic and human rights reasons.