Gynaecology & Obstetrics The thickness of endometrium at the time of implantation is : A 3 - 4 mm B 20 - 30 mm C 15 -20 mm D 30 - 40 mm 💡 Explanation The thickness of endometrium at the time of implantation is : ✓ Correct Answer: A. 3 - 4 mm