1. The 2000 Report of the World Health Organization (WHO) on maternal mortality: estimates developed by WHO, UNICEF and UNFPA,2004
2. African women at high risk of childbirth death-UN. Reuters News Agency;Evans,2003
3. Global burden of maternal death and disability;Abou Zahr;Br Med Bull. 67,2003
4. Obstetric fistula: a practical revew;Walley;Rev Gynecol Pract,2004