1. UNICEF. The progress of nations. The nations of the world ranked according to their achievements in child health, nutrition, education, family planning, and progress for women. UNICEF: New York; 1996. Available on-line at . Cited January 15, 2003.
2. Matercare International 2002. Available on-line at . Cited January 15, 2003.
3. Obstructed labour injury complex: obstetric fistula formation and the multifaceted morbidity of maternal birth trauma in the developing world;Arrowsmith;Obstet Gynecol Surv,1996
4. Maternal health around the world,1997
5. Martius’ gynaecological operations;McCall,1956