Fetal abdominal circumference is measured at the level of :

Abdominal Circumference (AC) is measured in the transverse section of the fetal abdomen at the level of the fetal stomach and the umbilical poion of the poal vein.This is usually affected in IUGR and is less useful in dating as it is the parameter most affected by fetal growth. Refer page no 479 of Text book of obstetrics,sheila balakrishnan 2 nd edition.