1. World Health Organization. Unsafe abortion, Global and regional estimates of the incidence of unsafe abortion and associated mortality in 2008. 6th ed. Geneva: World Health Organization; 2011.
2. Guttmacher institute: Facts on Induced Abortion worldwide- In Brief. New York, January 2012.
3. Sedgh G et al: Induced abortion: incidence and trends worldwide from 1995 to 2008: Guttmacher Institute, New York. The Lancet, February 18th, 2012 (Vol. 379, Issue 9816, Pages 625–632).
4. The Guttmacher institute: Susheela Singh, Deirdre Wulf, Rubina Hussain, Akinrinola Bankole, Gilda Sedgh. Abortion Worldwide: A Decade of Uneven Progress 2009.
5. Singh S, Fetters T, Gebreselassie H, Abdella A, Gebrehiwot Y, Kumbi S, Audam S. The Estimated Incidence of Induced Abortion In Ethiopia, 2008. In: International Perspectives on Sexual and Reproductive Health; 2010. p. 16–25.