1. Maternal mortality: who, when, where, and why;C Ronsmans;Lancet,2006
2. WHO (2010) Trends in maternal mortality: 1990 to 2008. Estimates developed by WHO, UNICEF, UNFPA and The World Bank. Geneva: WHO.
3. The Millennium Development Goals Report 28 –35,2011
4. Countdown to 2015 for maternal, newborn, and child survival: the 2008 report on tracking coverage of interventions;J Bryce;Lancet,2008
5. CSAEthiopia ICFinternational (2012) Ethiopia demographic and health survey 2011. Addis Ababa, Ethiopia and Calverton, Maryland, USA.