1. National Population Commission (Nigeria), ICF Macro Nigeria Demographic and Health Survey 2008 http://www.measuredhs.com/pubs/pdf/GF15/GF15.pdf
2. Overseas Development Institute Millennium Development Goals Report Card: Measuring Progress Across Countries 2010 http://www.odi.org.uk/resources/download/5027.pdf
3. Federal Ministry of Health Saving Newborn Lives in Nigeria: Newborn Health in the Context of the Integrated Maternal, Newborn and Child Health Strategy http://www.countdown2015mnch.org/documents/nigeria/nigeria-full-report.pdf
4. Factors contributing to maternal mortality in north-central Nigeria: a seventeen-year review;Ujah;Afr J Reprod Health,2005
5. Maternal mortality in Nigeria: the real issues;Harrison;Afr J Reprod Health,1997