Gynaecology & Obstetrics The best time to do an endometrial biopsy in a patient with suspected endometrial cancer is which of the following? A 9 - 10 day B 20 - 21 day C 26th day D 2nd day 💡 Explanation The best time to do an endometrial biopsy in a patient with suspected endometrial cancer is which of the following? ✓ Correct Answer: C. 26th day