Aim: to investigate the effect of L-arginine(Arg) on the changes in blood physiological indexes of pregnant mice to expatiates some mechanism of Arg on Intrauterine growth retardation(IUGR).Methods: 20 pregnant mice were randomly divided into control group and experimental group,the control group were given basic feed,and the experimental group were fed with diet containing 0.5% Arg,The blood sample were picked by neck vein after pregnancy 15d,EDTA anticoagulant,then it was measured by CA-500 automatic bloo...