Methods:
A total of 200 pregnant women admitted to hospitals in Zahedan were in 1393-4. Exclusion criteria were: women with a history of chronic disease and fetal anomalies and multiple pregnancy. Inclusion criteria were: pregnant women in the second trimester and third with LMP characteristics. A questionnaire was designed and pregnant women were studied by ultrasonography and femoral length and BPD were measured. Data with SPSS software, paired t-test and Pearson correlation coefficient were studied.