Gynaecology & Obstetrics Bleeding associated with anovulation is due to A Persistent proliferative endometrium. B Alterations in endometrial vascular structure. C Increased endometrial responsiveness to vasodilating prostaglandins. D Impaired prostaglandins concentration. 💡 Explanation Bleeding associated with anovulation is due to ✓ Correct Answer: A. Persistent proliferative endometrium.