Evaluation of Gestational Age by Kidney Length and Morphometric Assessment of Other Kidney Parameters - A Gross Fetal Study

Background: Determination of accurate gestational age (GA) must be focal point to provide calibrate maternal and fetal care for gynecologist and radiologist. Most widespread detection tool for fetal biometric parameter is ultrasonography that establish errorless GA commonly, but we confirmed it by gross anatomical study. The commonly used fetal biometric parameters by radiologist are crown rump length (CRL), fetal weight, abdominal circumference, and femur length, but most of the time, they are unable to furnish aggregate gestational age. In late trimesters, fetal kidney length along with other contemporary renal morphometric parameters provides précised results rather than other traditional parameters such as bi parietal diameter (BPD), femur length (FL), head circumference (HC), and abdominal circumference (AC) which are not of much use after the 24 th week of gestation. This study provides considerable supports to other existing radiological studies in determining the accurate maternal GA in all trimesters contrast with previously used fetal biometric indices. Materials and Methods: In this cross-sectional study, 65 aborted fetuses (130 foetal kidney) were collected from Obstetrics and Gynecology Department after the permission of college ethical committee and dually signed consent of guardians as per provided college format, fetal age was also correlated with hospital records and reports. Measurement of renal length, breadth, thickness, weight, distance from vertebral column and renal pyramid numbers, length, breadth was done by Vernier caliper, and statistically correlated with gestational age. The data were analyzed using SPSS software version 21 and Microsoft Word and Excel had been used to generate the graphs and tables, etc. Results: Highly significant correlation found between fetal kidney parameters and pyramid length and breadth between both left and right kidney with increase in GA while it was nonsignificant between both genders. Conclusions: This study represents the strong association between the fetal renal morphometric parameters with the GA of fetuses in all trimesters. These parameters in association with other fetal biometric indices BPD, HC, AC, and FL provide excellent result, which might be helpful for radiologist and gynecologist to confirm fetal GA and its intrauterine linear growth for good well-being of fetus.