This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Gynaecology & Obstetrics
A multigravida woman in labor room, after delivery and placenta removal, uncontrolled bleeding was seen. What is the most common cause of PPH in this woman? 
Select and explain. 
A. Atonic, B. Traumatic PPH, C. Clotting factor deficiency, D. Retained tissues
A: Atonic
Answer: A: Atonic 
Explanation: Atonicity causes about 80% of PPH. Causes of PPH: Uterine atonicity (m/c) Injury to any pa of genital tract Coagulopathy (von Willebrand's disease) Retained tissues - (Causes secondary PPH)