1. World Health Organization. Adolescent health overview [Internet]. World Health Organization; 2020 [cited October 9, 2020]. Available from: https://www.who.int/health-topics/adolescent-health#tab=tab_1. Accessed February 24, 2021
2. Adolescents and youth in developing countries: Health and development issues in context
3. WHO. Orientation programme on adolescent health for health-care providers [Internet]. Geneva, Switzerland; 2018: 6. Available from: https://www.who.int/maternal_child_adolescent/documents/pdfs/9241591269_op_handout.pdf. Accessed February 24, 2021
4. Menarche and Menstruation: A review of the Literature