1. WHO guidelines approved by the guidelines review committee. WHO guidelines on preventing early pregnancy and poor reproductive health outcomes among adolescents in developing countries;World Health Organization,2011
2. Adolescents: health risks and solutions,2017
3. Early marriages, adolescent and young pregnancies: report by the secretariat. Geneva: sixty-fifth world health assembly,2012
4. WHO guidelines on preventing early pregnancy and poor reproductive outcomes among adolescents in developing countries;Chandra-Mouli;J Adolesc Health,2013
5. Adding it up: costs and benefits of meeting the contraceptive needs of adolescents;Darroch,2016