According to the supplied material, primary PPH is generally defined as blood loss of at least:
Answer
500 mL within 24 hours
Explanation
The material defines **primary PPH** as blood loss of at least 500 mL within 24 hours after birth. It separately describes severe PPH as at least 1,000 mL within 24 hours. These thresholds support recognition, but clinical compromise also matters. **Key takeaway:** Use timing and blood-loss thresholds together with the patient’s condition.\n\n**Glossary:** **Primary PPH**: haemorrhage within 24 hours after birth.