1. Research. Maternal mortality in 2000: Estimates developed by WHO, UNICEF, UNFPA,2004
2. ACOG Educational Bulletin. Postpartum haemorraghe 243, 1998.
3. Abalos E. Active versus expectant management of the third stage of labour: RHL commentary. [consultado 2/3/2009). The WHO Reproductive Health Library; Geneva: World Health Organization. Manejo activo III estadio
4. Hemorragia postparto;Karlsonn;An Sist Sanit Navar,2009
5. Sangramiento post parto;Macías,2008