Buckley, S.J. (2015) Hormonal physiology of childbearing: Evidence and implications for women, babies, and maternity care. [pdf] Available at: http://www.nationalpartnership.org/our-work/resources/health-care/maternity/hormonal-physiology-of-childbearing.pdf
National Maternity Review (2016) Better Births. Improving Outcomes of Maternity Services in England. A Five Year Forward View for Maternity Care. Available at: https://www.england.nhs.uk/wp-content/uploads/2016/02/national-maternity-review-report.pdf
World Health Organisation (2018) Intrapartum care for a positive childbirth experience. [online] Available at: https://apps.who.int/iris/bitstream/handle/10665/260178/9789241550215-eng.pdf?sequence=1