Allen, M., & Thornton, S. (2013). Providing one-to-one care in labour. Analysis of ‘Birthrate Plus’ labour ward staffing in real and simulated labour ward environments: Birthrate+ and labour ward workload. BJOG: An International Journal of Obstetrics & Gynaecology, 120(1), 100–107. https://doi.org/10.1111/j.1471-0528.2012.03483.x

Grollman, C., Daniele, M. A. S., Brigante, L., Knight, G. M., Latina, L., Morgan, A. S., & Downe, S. (2022). Maternity service reconfigurations for intrapartum and postnatal midwifery staffing shortages: Modelling of low-risk births in England. BMJ Open, 12(9), e051747. https://doi.org/10.1136/bmjopen-2021-051747

Hernán, M. A., & Robins, J. M. (2020). Causal Inference: What If. Chapman & Hall/CRC.

Hodnett, E.D., Downe, S., Walsh, D. (2013). Alternative versus conventional institutional settings for birth. Cochrane Database of Systematic Reviews.8, Art. No.: CD000012. https://doi.org/10.1002/14651858.CD000012.pub4

Maga, G., Brigante, L., Del Bo, E., Cappadona, R., Daniele, M. A. S., Arrigoni, C., Caruso, R., & Magon, A. (2022). The Italian midwifery core outcome set (M-COS) for healthy childbearing women and newborns: Development and initial validation study. Midwifery, 108, 103292. https://doi.org/10.1016/j.midw.2022.103292

National Institute for Health and Care Excellence (NICE). (2015). Safe midwifery staffing for maternity settings. NICE.

Rossi, R., Bauer, N. H., Becke-Jakob, K., Grab, D., Herting, E., Kehl, S., Mitschdörfer, B., Olbertz, D., Rösner, B., Schlembach, D., Tillig, B., & Trotter, A. (2021). Empfehlungen für die strukturellen Voraussetzungen der perinatologischen Versorgung in Deutschland (No. 087–001). Arbeitsgemeinschaft der Wissenschaftlichen Medizinischen Fachgesellschaften e.V. (AWMF).

Royal College of Midwives. (2022). RCM Position Statement Safer Staffing. The Royal College of Midwives.

Smith, V., Daly, D., Lundgren, I., Eri, T., Begley, C., Gross, M. M., Downe, S., Alfirevic, Z., & Devane, D. (2017). Protocol for the development of a salutogenic intrapartum core outcome set (SIPCOS). BMC Medical Research Methodology, 17(1), 61. https://doi.org/10.1186/s12874-017-0341-5

Tilden, E. L., & Snowden, J. M. (2018). The Causal Inference Framework: A Primer on Concepts and Methods for Improving the Study of Well-Woman Childbearing Processes. Journal of Midwifery & Women’s Health, 63(6), 700–709. https://doi.org/10.1111/jmwh.12710

World Health Organization. (2018). WHO recommendations: intrapartum care for a positive childbirth experience. Geneva: World Health Organization.

Yelland, A., Winter, C., Draycott, T., & Fox, R. (2013). Midwifery staffing: Variation and mismatch in demand and capacity. British Journal of Midwifery, 21(8), 579–589. https://doi.org/10.12968/bjom.2013.21.8.579