Which one of the following is the major cause of postpartum haemorrhage?

Correct option is A

Ans. (a)
Sol. Atonic uterus is the most common cause of postpartum hemorrhage. It fails to contract after delivery, leading to excessive bleeding.
Explanation of each option:
· (a) Atonic Uterus – Correct answer. Accounts for 70–80% of PPH cases.
· (b) Thrombin – Coagulation disorder, less common than atony.
· (c) Pre-Eclampsia – Can complicate pregnancy, not directly cause PPH.
· (d) Incoordinate Uterine Action – Rare cause involving uncoordinated contractions.