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Updated: May 10, 2026

Point-of-Care Kidney and Genitourinary Ultrasound in Adults: Image Acquisition
Published on: June 21, 2024
Evaluation of the normal fetal kidney length and its correlation with gestational age
Farrokh Seilanian Toosi1, Hossein Rezaie-Delui
1Department of Radiology, Quaem Hospital, Mashhad University of Medical Sciences, Mashhad, Iran. fstoosi@yahoo.com
Abstract:
A true estimation of gestational age (GA) plays an important role in quality maternity care and scheduling the labor date. This study aimed to evaluate the normal fetal kidney length (KL) and its correlation with GA. A cross-sectional study on 92 pregnant women between 8th and 10th week of gestation with normal singleton pregnancy underwent standard ultrasound fetal biometry and kidney length measurement. univariate and multivariate linear regression analysis was used to create a predictive equation to estimate GA on the KL and fetobiometry parameters. A significant correlation was found between GA and KL (r=0.83, P<0.002). The best GA predictor was obtained by combining head circumference, fetal biparietal diameter, femur length and KL with a standard error (SE) about 14.2 days. Our findings showed that KL measurements combination with other fetal biometric parameters could predict age of pregnancy with a better precision.
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