Gynaecology & Obstetrics Smita is a case of infeility. What is the right time in her menstrual cycle to do endometrial biopsy. A 12 - l4 days B 17 - 19 days C 20 - 22 days D 3-5days 💡 Explanation Smita is a case of infeility. What is the right time in her menstrual cycle to do endometrial biopsy. ✓ Correct Answer: C. 20 - 22 days