1. UNFPA. United Nations Population Fund. State of World Population 2013. Motherhood in Childhood: Facing the Challenge of Adolescent Pregnancy. Available: www.unfpa.org/publications/state-world-population-2013. 2013. Accessed March 02, 2016.
2. UNFPA. United Nations Population Fund. Why we need to invest In Adolescents and Young Girls to Reduce Maternal Mortality. Available: www.who.int/pmnch/about/governance/partnersforum/youth_unfpa.pdf. 2014. Accessed March 02, 2016.
3. Maternal-perinatal morbidity and mortality associated with adolescent pregnancy in Latin America: cross-sectional study;Conde-Agudelo;Am J Obstetr Gynecol,2005
4. Antenatal management of teenage pregnancy;Whitworth;Obstetr Gynaecol Reprod Med,2010
5. Gynecologic age is an important risk factor for obstetric and perinatal outcomes in adolescent pregnancies;Kaplanoglu;Women Birth,2015