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
[{'content': 'Growth restriction during intrauterine period is estimated by which sonographic parameter? \nSelect and explain. \nA. Femur length, B. BPD, C. Abdominal circumference, D. Head circumference', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 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.', 'role': 'assistant'}]