1. Estimates by WHO, UNICEF, UNFPA, The World Bank and the United Nations Population Division,2015
2. Global causes of maternal death: a WHO systematic analysis;L Say;Lancet Glob Health,2014
3. Saving lives, improving mothers’ care—surveillance of maternal deaths in the UK 2012–14 and lessons learned to inform maternity care from the UK and Ireland Confidential Enquiries into Maternal Deaths and Morbidity 2009–14;M Knight,2016
4. The classification, diagnosis and management of the hypertensive disorders of pregnancy: a revised statement from the ISSHP;AL Tranquilli;Pregnancy Hypertens,2014
5. Global and regional estimates of preeclampsia and eclampsia: a systematic review;E Abalos;Eur J Obstet Gynecol Reprod Biol,2013