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
Single best parameter to assess fetal well being is : 
Select and explain. 
A. Femur length, B. Abdominal circumference, C. Head circumference, D. Biophysical profile
D: Biophysical profile
Answer: D: Biophysical profile 
Explanation: Biophysical tests are screening for uteroplacental insufficiency Reference: Dutta's textbook of obstetrics 7th edition page no 108