GBD 2015 Maternal Mortality Collaborators. Global, regional and national levels of maternal mortality, 1990-2015: a systematic analysis for the Global Burden of Disease Study 2015. Lancet 2016; 388: 1775-812
Knight M, Bunch K, Tuffnell D et al. Saving Lives, Improving Mothers’ Care- lessons learned to inform maternity care from the UK and Ireland Confidential Enquiries into Maternal Deaths and Morbidity 2017-19. National Perinatal Epidemiology Unit, University of Oxford; 2021.
WHO. WHO recommendations. Uterotonics for the Prevention of Postpartum Haemorrhage. 2018.