To identify women at risk of adverse outcomes from postpartum bleeding and initiate first-response treatment, it is recommended to use the following criteria: objectively measured blood loss threshold of ≥300 mL with any abnormal haemodynamic sign (pulse >100 bpm, shock index >1, systolic blood pressure <100 mmHg, or diastolic blood pressure <60 mmHg), or objectively measured blood loss of ≥500 mL, whichever occurs first within 24 hours after birth, and with particular vigilance during the first 2 hours