Assessment of Neonatal Gestational Age by Ultrasonographic Transverse Cerebellar Diameter Measurement - A Prospective Cross-Sectional Study

Document Type : Original Article

Authors

Department of Pediatrics, Vivekananda Polyclinic and Institute of Medical Sciences, Lucknow

10.22038/ijn.2025.85418.2638

Abstract

Background: Accurate assessment of gestational age (GA) is important for management and monitoring of neonates. Traditional GA in neonates is assessed mother's first day of last menstrual period (LMP) which can be inaccurate in case of irregular cycle and poor y. Fetal age assessment TCD well studied but studies in neonatal period. The emerging biometric parameter, transverse cerebellar diameter (TCD), offers advantages as it remains unaffected by conditions alter skull shape and antenatal growth fluctuations. Aim to evaluate the effectiveness of TCD measurement neonatal gestational age.
Methods: This prospective cross-sectional study included 112 neonates, spanning preterm and term infants, assessed within 72. Last Menstrual Period (LMP) was used to determine GA. TCD scans were conducted a GE LogiQ-V2 scanner and pediatric curvilinear probe.
Results: There was a statistically significant correlation (p < 0.0001) between TCD and gestational age. Linear regression analysis showed 0.4052 change in gestational age per unit change in TCD. Spearman correlation analysis show strong positive correlations between TCD and gestational age (r = 0.8786), weight (r = 0.8242) and length (r = 0.8526). A regression equation based on TCD predict neonatal gestational age. Additionally, TCD demonstrated a very strong positive correlation with asymmetric IUGR (r = 0.9161) but a weak positive correlation with symmetric IUGR in relation to gestational age (r = 0.4761). Notably, comparisons with other studies in diverse ethnic populations revealed significant differences in TCD findings.
Conclusion: Despite not directly indicating IUGR, TCD shows potential utility in estimating neonatal gestational age as it correlates significantly with advancing gestational a
 

Keywords

References

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Iranian Journal of Neonatology
Volume 17, Issue 1
January 2026
Pages 27-33

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