From “wait and see” to

The shift in four lines.

Physiology now counts.

Visual estimation misses half.

Bundle, not sequence.

The same blood loss is not the same risk.

For many years, the focus was on whether the woman had lost 500 mL. Now, the definition has shifted to assess if her physiological loss is enough to cause action. Although the change seems minor, it is significant in practice: in the original data, 25% of women who died or had severe complications never lost 500 mL^[6].

Measure, don’t estimate. Apply the calibrated drape immediately after birth, once amniotic fluid is excluded, and read the cumulative figure ^{[1] [2]}.

Assess the woman, not just the volume. Blood loss alongside uterine tone, ongoing flow, pulse, blood pressure and shock index, at least every 15 minutes in the first hour ^[1].

Treat the trigger as authorisation. The criteria are meant to initiate the response, not to guide ongoing observation. You do not require permission to act based on them. ^[1].

Everything at once. When the trigger activates: perform massage, administer oxytocics, tranexamic acid, establish IV access and fluids, conduct examination, and escalate within 15 minutes if bleeding persists. ^{[1] [3]}.

Watch the first hour; stay vigilant for 24. Most life-threatening postpartum haemorrhage begins early, but the definition window is 24 hours ^[1].

Known or suspected anaemia increases caution: severe anaemia more than doubles the risk of death after bleeding begins and diminishes the body’s initial protective reserve ^[4]. Compare measured blood loss to baseline haemoglobin when available. Treat post-haemorrhage anaemia as an integral step, ensuring haemoglobin is monitored and iron replenished before discharge, rather than postponing it to another provider ^[4].

An illustrative scenario based on E-MOTIVE trial observations.

It is 3 am. The drape reads 350 mL, and her pulse is 108; by the old threshold, nothing has happened yet. Under the new definition, the trigger is met. You start the bundle now: massage, oxytocics, tranexamic acid, fluids, examination, and the on-call registrar is called at the same moment, not after the next observation. Twenty minutes later, the bleeding is settling. Nothing about the night felt dramatic, which is precisely what a working pathway feels like from the inside.

Bedside card · to do

[1]  WHO, FIGO, ICM. Consolidated guidelines for the prevention, diagnosis and treatment of postpartum haemorrhage, 2025. Paper

[2]  Yunas I, Sindhu KN, Devall AJ, et al. Diagnostic accuracy of subjective visual estimation and calibrated blood-collection drapes for postpartum haemorrhage. Cochrane diagnostic test accuracy review, as summarised in the 2026 Lancet Series. Paper

[3]  Gallos I, Devall A, Martin J, et al. Randomized Trial of Early Detection and Treatment of Postpartum Hemorrhage (E-MOTIVE). New England Journal of Medicine, 2023;389:11–21. Paper · DOI

[4]  Gallos ID, Sindhu KN, Yunas I, et al. Prevention of postpartum haemorrhage: from evidence to implementation at scale. The Lancet, 2026. Paper · DOI

[5]  University of Oxford, Nuffield Department of Women’s and Reproductive Health. E-MASTER Phase I study. Study page

[6] Gallos I, Williams CR, Price MJ, et al. Prognostic accuracy of clinical markers of postpartum bleeding in predicting maternal mortality or severe morbidity: a WHO individual participant data meta-analysis. The Lancet, 2025. Paper