This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diagnosis in Obstetrics, Subject name: Gynaecology & Obstetrics
Growth restriction during intrauterine period is estimated by which sonographic parameter? 
Select and explain. 
A. Femur length, B. BPD, C. Abdominal circumference, D. Head circumference
C: Abdominal circumference
Answer: C: Abdominal circumference 
Explanation: Ans. is c, i.e. Abdominal circumferenceAs discussed in chapter 6 for growth of fetus there is only one ultrasound parameter which is useful and that is abdominal circumference.Now whether it is Macrosomia/IUGR - best remains Abdominal circumference.