Fetal Transverse Cerebellar Diameter (TCD) Measurement for Gestational Age Prediction in the Second and Third Trimesters of Pregnancy

Abstract

Background:

The purpose of this study was to see how accurate transverse cerebellar diameter (TCD) measurement is at predicting gestational age in normal fetuses. In the 2^nd & 3^rd trimesters of pregnancy a range of sonographics fetal biometric characteristics can be utilized to determine gestational age. Other parameters, such as bi-parietal diameter and fetal length, are used to determine transcerebellar diameter.

Objective(s): To determine the predictability of GA estimated from fetal TCD assessed on ultrasonography in the 2^nd and 3^rd trimesters of pregnancy.

Methodology:

This was a cross-sectional study conducted at the Ch. Mohammad Akram teaching and research hospital on 84 pregnant healthy ladies with fetuses ranging in age from 18 to 45 years old. During the 2^nd and 3^rd trimesters of pregnancy a routine ultrasound scan was done. In additions to the standard biometric parameter the transcerebellar diameter was estimated.

Results: The TCD of 84 patients as a measure of gestational age in weeks. These were generated from data collected during the study and include mean and standard deviation TCD measurements of 84 participants ranging in gestational age from 14 to 40 weeks. The current research found a significant link between the GA of TCD and the GA of BPD and fetal length.  The TCD(mm) mean and standard deviations were 33.74 ± 11.762 respectively. The TCD gestational age mean and standard deviations were 28.160 ± 6.7942 respectively. Bi-parietal diameter (mm) has a mean and standard deviation of 68.24 ± 18.503. Bi-parietal diameter had a mean and standard deviation of 27.996 ± 6.9099 gestational age. The standard deviation and mean  50.32 ± 16.265 mm Fetal length The mean and standard deviation of fetal length gestational age are 27.423 ± 6.7625. Different criteria such as transcerebellar diameter, biparietal diameter, and femur length, are used to establish the gestational age of the fetus in this cross-sectional analysis.

Conclusion(s):

The TCD is a set of accurate variables for assessing GA in pregnant women in the 2^nd and 3^rd trimesters.

Key words: Transcerebellar diameter; Gestational age;  Fetal length ; Bi-parietal diameter.

DOI: 10.7176/JHMN/93-08

Publication date:September 30^th 2021