Cross sectional study of total of 200 pregnant women, 100 second trimester and 100third trimester, between 13 and 40 weeks of gestational age attending the department of radiology at P.D.U.Medical college, Rajkot for a fetal ultrasound scan was done. Femur length (FL) was measured; Gestational agewas measured by Hadlock’s method and Loughna P et al’s method; also gestational age was assessed from LMPof the women. The mean values of femur length and predictive accuracy of fetal femur length was analyzed andcompared with other studies.
Results:
Mean of FL increased progressively from 13-40 weeks of gestation. During both second and third trimesters,Hadlock’s formula and Loughna P’s method were equally accurate to assess the gestational age. But femur lengthwas more accurate in second trimester than in third trimester. There was discrepancy in values of femur lengthas compared to other studies.
Conclusion:
Like other studies the present study also found the need of fetal charts that were specific for individualpopulation and ethnic group to determine gestational age and EDD to enable the development of better clinicalguidelines for the present population.