Accurate gestational age (GA) estimation is important to an obstetrician. The Fetal parameters usually taken into account while assessing Gestational age are: Femur length (FL), Bi-Parietal Diameter (BPD), Head Circumference (HC) and Abdominal Circumference (AC) after 24 weeks of gestation. Fetal kidney length and circumference were such non-traditional parameters for estimating GA under study. It is the more accurate method of assessing GA estimation by Fetal kidney length and circumference rather than BPD, FL, HC and AC after 30weeks of Gestation. This study attempts at estimating gestational age using fetal kidney length and circumference after 30 weeks of gestation and comparison made with gestational age calculated from their last menstrual period and gestational determined by standard biometric measurements Materials and Methods: 100 pregnant women are included in study with regular periods and without fetal renal anomalies. Results: The mean deviation from the gestational age at all weeks is least for fetal kidney length and circumferences and indicates kidney length and circumferences correlates well with gestational age. Conclusion: FKL & FKC are the most accurate parameters for estimating GA than other biometric indices in late 2nd and 3rd trimester of pregnancy.
