iarjmsIARJMSIARJMS2708-3594https://doi.org/10.47310/iarjms.2022.v03i01.006Evaluation of Correlation & Variability between Transcerebellar Diameter and Gestation age in Normal pregnanciesNehaPatialAnupamJhobtaSumalaKapilaDepartment of Radiodiagnosis, IGMC Shimla, IndiaBackground: Transcerebellar diameter is emerging as a promising indicator for assessment of the Gestational age. Present study was done with the objective to evaluate the Correlation & estimate the Variability between Transcerebellar Diameter and Gestation age in Normal pregnancies. Material and Methods: This Prospective Cross-sectional study was conducted on antenatal women of gestational age 15-40 weeks with normal singleton pregnancies cases attending the antenatal clinic and admitted in the Department of Obstetrics and gynecology and sent to Department of Radiology KNSH M&C and IGMC Shimla for Antenatal USG Scan. In every patient TCD was measured. Data was analysed by appropriate statistical test using EPI INFO Version 7.2 software. Correlation coefficients were then used to compare TCD with Gestational age in normal pregnancies. Results: In this study 100 were normal pregnancies were studied. Mean age of study participants was 24.8±3.25years. Maximum number of patients (54%) was between 21-25 years followed by 26-30 years (32%). Maximum number of patients (44%) was between 30-36 weeks of gestation and least number of patients (5%) was between 12- 18weeks. It was noted that minimum variability was seen during 12-18 weeks i.e. ±0.34weeks and maximum variability in estimation of gestational age by transcerebellar diameter was seen between 24-30 weeks i.e. ±1.38 weeks. It was observed that during second trimester TCD had the highest correlation with gestational age i.e. 0.987. It is also noted that TCD has relatively lesser correlation with gestational age in third trimester. i.e. 0.788. Conclusion: Overall it was noted that TCD had a strong correlation with gestational age throughout the pregnancy which was statistically significant.