Estimation of fetal gestational age by fetal kidney length measurement from 20-40th weeks of gestation in healthy women with uncomplicated pregnancy

Abstract

In the precise estimation of gestational age, fetal kidney length measurement by ultrasound proves to be an effective parameter from 20-40th weeks of gestation.To conduct an ultrasound examination for healthy women with uncomplicated pregnancy from 20 weeks to 40 weeks to determine the association between fetal kidney length and gestational age determined by the last menstrual period and other ultrasound parameters (such as biparietal diameter, head circumference, abdominal circumference and length of the femur). Obtain a nomogram and estimate the gestational age of the fetus by the length of the fetal kidney measured by ultrasound. This study aims to validate the measurement of fetal kidney length as an additional morphological parameter with less variability for estimating fetal growth. This measurement can be included into the pregnancy dating model after 20 weeks of gestation as it is easy to perform, especially when the measurement of biparietal diameter and head circumference is difficult.