Which is the single most common cause of primary postpartum hemorrhage?

• A Genital tract trauma
• B Uterine atony ✓
• C Retained placental tissue
• D Inherited coagulation disorders

Explanation

Tone accounts for about 70 percent of primary PPH cases, making uterine atony the leading cause. Trauma contributes roughly 20 percent, retained tissue around 10 percent, and intrinsic coagulopathy about one percent. This underlies the 'four T' framework: Tone, Trauma, Tissue, Thrombin. Any student who knows PPH epidemiology will pick atony immediately, while those who overemphasize dramatic lacerations may be drawn toward trauma.

Reference: Williams Obstetrics, 25th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.