<prompt> Regarding lUGR:Abdominal circumference AC is the least sensitive parameter for detection of lUGRIn asymmetric lUGR head circumferenceabdominal circumference HCAC is reducedSerial biparietal diameter BPD is the only impoant measurement in lUGRAbdominal circumference is the most accurate measurement  <response>: Abdominal circumference is the most accurate measurement to predict IUGR. AC below 10th centile is used as a cutoff. AC should increase by at least 10mm in 2 weeks. AC is measured preferably at the level of the junction of the left and right poal veins,umbilical vein and as round as possible. TEXTBOOK OF OBSTETRICS, Sheila Balakrishnan,2nd edition, page no.205 