This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
Bleeding associated with anovulation is due to 
Select and explain. 
A. Persistent proliferative endometrium., B. Alterations in endometrial vascular structure., C. Increased endometrial responsiveness to vasodilating prostaglandins., D. Impaired prostaglandins concentration.
A: Persistent proliferative endometrium.
Answer: A: Persistent proliferative endometrium. 
Explanation: As ovulation does not occur, proliferative endometrium persists causing bleeding.