Gynaecology & Obstetrics All of the following are commonly used for estimation of gestational age in mid trimester EXCEPT: March 2013 A Biparietal diameter B Crown Rump Length C Abdominal circumference of fetus D Femur length 💡 Explanation All of the following are commonly used for estimation of gestational age in mid trimester EXCEPT: March 2013 ✓ Correct Answer: B. Crown Rump Length