الفهرس 
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Abstract
In routine ultrasonography, the ultrasonologist measures the bi-parietal diameter (BPD), head circumference (HC), abdominal circumference (AC) and femur length (FL) in estimating the gestational age (GA) and estimated date of delivery. However, as the pregnancy advances these parameters become increasingly unreliable in prediction of GA. Estimation of GA in late second and third trimester accurately still a problem till now. Fetal kidney has been shown a steady growth of 1.7 mm fortnightly (every 2 weeks) along pregnancy and is unaffected by growth abnormalities. Many studies have reported that fetal kidney length (FKL) correlates with the gestational age in late trimester very strong. The study aimed to assess the accuracy of the gestational age estimated by mean fetal kidney length compared to multiple growth parameters like BPD, HC, AC & FL in addition to the actual gestational age derived from the reliable last menstrual period.
So, this study was conducted to evaluate the accuracy of FKL in estimation of gestational age and to compare it with other routine parameters and Its significance in intrauterine growth restriction cases.
This cross sectional study included 80 pregnant women between 20 – 40 GA of pregnancy who were divided into two groups; healthy women with normal pregnancy and pregnant women with IUGR pregnancy.
In this study, age, residence, occupation, GA and BMI showed statistical insignificant differences between both groups as p>0.05. Regarding ultrasonographic parameters, group II had lower HC, FL and AC than group I but with statistical insignificant differences between both groups as p>0.05.