Results: The mean of CPR in group of early IUGR and late IUGR were 0.55 ± 0.14, 1.59 ± 0.69, respectively. The mean of CPR in group IUGR with an estimated fetal weight under the 3th percentile was 1.49 ± 0.76, lower than the mean of CPR in group IUGR with an estimated fetal weight from 3th percentile to 10th percentile.