According to current international and Indian examination convention, primary postpartum hemorrhage following a vaginal delivery is defined as estimated blood loss of at least:

• A 300 mL within 24 hours of delivery
• B 500 mL within 24 hours of delivery ✓
• C 750 mL within 12 hours of delivery
• D 1000 mL within 24 hours of delivery

Explanation

Primary PPH is defined as blood loss of 500 mL or more within 24 hours of a vaginal birth, regardless of mode of onset. The 1000 mL threshold applies to cesarean delivery, so option D is the classic trap. The old 300 mL cutoff was abandoned because clinically significant morbidity begins well above it, and visual estimation routinely underestimates true loss.

Reference: Williams Obstetrics, 26th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.