Abstract & Overview
Background: An accurate prediction is the base of the correct decision regarding delivery management and delivery date.Conventionally biparietal diameter, head circumference, femur length, and abdominal circumference are utilized for gestational age estimation.Transverse cerebellar diameter (TCD) measurement has emerged as a reliable alternative, especially when the LMP is unknown.Objective: To determine the predictive accuracy of transverse cerebellar diameter in determining gestational age taking the last menstrual period as the gold standard.Methodology: This cross-sectional study was performed in the Radiology Department of CMH Bahawalpur from July 2022 to December 2022.After obtaining informed consent, an Ultrasound examination was performed to measure femur length (FL), biparietal diameter (BPD) and transverse cerebellar diameter.TCD, BPD and FL were measured according to the standard planes.Data analysis was conducted using SPSS version 25.Predictive accuracy was assessed using a regression model based on the squared correlation (R 2 ) between predicted age and estimated gestational age based on the last menstrual period.Results: The mean maternal age was 30.26 ±5.88 years and the mean gestational age was 24.62±4.65 weeks based on the last menstrual period.Fetal measurements including FL (β=3.511,3.376-3.647),BPD (β=2.357,95% CI: 2.267-2.447),TCD (β=0.382,0.367-0.397)and predicted age according to TCD (β=0.948,0.909-0.988)revealed a significant relationship with gestational age based on LMP with R2 values ranging from 0.910 to 0.922 (p <0.001).Conclusion: This study showed a strong correlation between transverse cerebellar diameter and gestational age based on LMP.