1. The Alan Guttmacher Institute (AGI). Sharing responsibility: women, society and abortion worldwide. New York: AGI; 1999.
2. Maternal mortality in 2005; Estimates Developed by WHO, UNICEF, UNFPA and The World Bank, WHO, Geneva 2007.
3. Lule E, Singh S, Chowdhury SA. Fertility regulation behavior and their costs: contraception and unintended pregnancies in Africa and Eastern Europe and Central Asia. Washington: World Bank; 2007.
4. Chhabra R, Nuna C. Abortion in India: an overview. New Delhi: Veerendra printers, Ford Foundation; 1994.
5. Washington AE, Cates W, Wasserheit J. Preventing pelvic inflammatory disease. JAMA. 1991;266(4):2574–80.