1. World Health Organization, Unicef, UNFPA, The World Bank. Trends in Maternal Mortality 1990 to 2008: Estimates developed by WHO, Unicef, UNFPA and The World Bank. Geneva: World Health Organization 2010. Available from URL: http://www.who.int/reproductivehealth/publications/monitoring/9789241500265/en/ (accessed August 2013).
2. Public Health Agency of Canada. Maternal Mortality in Canada. Available from URL: http://www.phac-aspc.gc.ca/rhs-ssg/maternal-maternelle/mortality-mortalite/index-eng.php (accessed August 2013).
3. Bateman BT, Berman MF, Riley LE, Leffert LR. The epidemiology of postpartum hemorrhage in a large, nationwide sample of deliveries. Anesth Analg 2010; 110: 1368-73.
4. Lutomski JE, Byrne BM, Devane D, Greene RA. Increasing trends in atonic postpartum haemorrhage in Ireland: an 11-year population based cohort study. BJOG 2012; 119: 306-14.
5. Caughey AB, Sundaram V, Kaimal AJ, et al. Systematic review: elective induction of labor versus expectant management of pregnancy. Ann Intern Med 2009; 151: 252-63.