Background: Accurate gestational age (GA) determination is vital for managing obstetric care
but becomes challenging in the late second and third trimesters due to increasing variability in
conventional fetal biometrics.
Objectives: This study investigates fetal kidney length (FKL) as a potential parameter for
reliable GA estimation during this period.
Patients and methods: A cross-sectional study was conducted on 100 pregnant women with
singleton pregnancies and certain dates, stratified into four gestational groups (n=25 per group).
All participants underwent ultrasonography to measure FKL, biparietal diameter (BPD), femur
length (FL), and abdominal circumference (AC).
Results: A strong positive correlation was found between all biometric parameters and different
gestational ages. Fetal kidney length demonstrated an exceptionally strong and statistically
significant correlation with gestational age (r=0.899, p