Best fetal parameter to diagnose IUGR fetus is:-
Estimation of IUGR is frequently made by the ratio of Head to abdominal circumference HC/AC ratio.This ratio compares the most preserved organ in the malnourished fetus, the brain, represented by the circumference of the fetal head, with the most compromised organ, the liver, represented by the fetal AC. Head circumference is last to be affected. Since the liver is first organ be affected in IUGR babies, the abdominal circumference will be first parameter to be compromised in growth restriction
Femur length
Head circumference
Abdominal circumference
CRL
Intra Uterine Growth Restriction, Intrapaum and Antepaum Fetal Surviellance