AIMS Physiology-Informed Maternity Services (PIMS) - March 2025

ISSN 2516-5852 (Online)

AIMS Journal, 2025, Vol 37, No 1

Painting of pregnant woman in a birth pool viewed from above

Art by Sophie Jenna

Latest update from the PIMS team!

The NIHR (National Institute for Health and Care Research) recently asked the Campaigns team to provide our views on the research, conclusions and the potential implications of the June 2024 waterbirth research study:

Maternal and neonatal outcomes among spontaneous vaginal births occurring in or out of water following intrapartum water immersion: The POOL cohort study[1]

This large-scale UK study adds to this 2022 review on the evidence for the safety of waterbirths,[2] and to this March 2024 study;[3] it found no increase in rates of adverse outcomes for women or babies. This is important given that the NICE guideline currently states that there is insufficient high-quality evidence to either support or discourage giving birth in water.[4]

We are concerned by the professional reticence to offering waterbirth in obstetric units. This has been a longstanding issue for callers to our helpline. Research has found[5] a lack of equity of access to waterbirths for Black and Asian women and those from deprived areas.

AIMS calls for all maternity units to offer access to waterbirth to all women who want it.


[1] Sanders J, Barlow C, Brocklehurst P, Cannings-John R, Channon S, Cutter J, et al. (2024) Maternal and neonatal outcomes among spontaneous vaginal births occurring in or out of water following intrapartum water immersion: The POOL cohort study. BJOG; 131(12): 1650–1659. https://doi.org/10.1111/1471-0528.17878

[2] Burns E, Feeley C, Hall PJ, et al. (2022) Systematic review and meta-analysis to examine intrapartum interventions, and maternal and neonatal outcomes following immersion in water during labour and waterbirth. BMJ Open;12:e056517. https://bmjopen.bmj.com/content/12/7/e056517

[3] McKinney, Jordan A. et al. (2024) Water birth: a systematic review and meta-analysis of maternal and neonatal outcomes. American Journal of Obstetrics & Gynecology, Volume 230, Issue 3, S961-S979.e33 https://www.ajog.org/article/S0002-9378(23)00604-X/fulltext

[5] Aughey, H., Jardine, J., Moitt, N. et al. Waterbirth: a national retrospective cohort study of factors associated with its use among women in England. BMC Pregnancy Childbirth 21, 256 (2021). https://doi.org/10.1186/s12884-021-03724-6


The AIMS Journal spearheads discussions about change and development in the maternity services..

AIMS Journal articles on the website go back to 1960, offering an important historical record of maternity issues over the past 60 years. Please check the date of the article because the situation that it discusses may have changed since it was published. We are also very aware that the language used in many articles may not be the language that AIMS would use today.

To contact the editors, please email: journal@aims.org.uk

We make the AIMS Journal freely available so that as many people as possible can benefit from the articles. If you found this article interesting please consider supporting us by becoming an AIMS member or making a donation. We are a small charity that accepts no commercial sponsorship, in order to preserve our reputation for providing impartial, evidence-based information.

JOIN AIMS

MAKE A DONATION

Buy AIMS a Coffee with Ko-Fi

AIMS supports all maternity service users to navigate the system as it exists, and campaigns for a system which truly meets the needs of all.

Latest Content

Journal

« »

Women, Pregnancy and Artificial Int…

AIMS Journal, 2025, Vol 37, No 4 By Christopher Yau, Nuffield Department for Women’s & Reproductive Health, University of Oxford on behalf of the MUM-PREDICT and OPTIMAL…

Read more

What has the AIMS Campaigns Team be…

AIMS Journal, 2025, Vol 37, No 4 What has the AIMS Campaigns Team been up to this quarter? By The AIMS Campaigns Team Published written outputs: 19th August: Peer review…

Read more

Conflicting advice for pregnant wom…

AIMS Journal, 2025, Vol 37, No 4 Researchers Siang Ing Lee and Ngawai Moss report on the qualitative study they conducted to inform a core outcome set for studies of preg…

Read more

Events

« »

AIMS Workshop: Wellbeing

AIMS is delighted to be hosting a Wellbeing workshop delivered by Ruth Weston , veteran birth activist, AIMS member and author of 'Born Stroppy Make Change Happen'. This…

Read more

Threads of Protest: Human Rights in…

It combines the talents and knowledge of members of the public, artists, professional crocheters and charitable organisations to create crochet artwork designed to challe…

Read more

AIMS Workshop: The Foundation Stone…

Join us for one of our series of interactive online AIMS workshops " The Foundation Stones for Supporting the Physiological Process in Pregnancy and Birth ". Please follo…

Read more

Latest Campaigns

« »

AIMS, ARM and Birthrights Open Lett…

AIMS (Association for Improvements in the Maternity Services), ARM (the Association of Radical Midwives) and Birthrights are jointly calling for action in the light of th…

Read more

NICE Intrapartum Care - Water birth…

AIMS submitted comments on the draft NICE Guideline update on Intrapartum care for Water birth: second stage of labour (August 2025). You can read the the draft here You…

Read more

AIMS Responds to NHS 10 Year Workfo…

NHS workforce planning needs to be fit for the maternity service The current system of NHS workforce planning in England is not delivering a safe, personalised and equita…

Read more