Diagnostic Accuracy Of Transverse Cerebellar Diameter In Estimation Of Gestational Age Compared To Femur Length And Biparietal Diameter In The Second And Third Trimesters Of Pregnancy

Abstract

Introduction: The exact determination of gestational age is so important in management of the antepartum care, and for adequate planning of proper intervention or therapy. Objective: The aim of the present study is to assess the diagnostic accuracy of transversecerebellar diameter (T.C.D.) measurement in estimation of the gestational age during the second and third trimesters compared to the current fetal biometric measurements including femure length and biparietal diameter. Patient and method: The study included 300 pregnant women with sure and reliable dates fulfilling the inclusion criteria at department of Obstetrics and Gynecology, Kasr Alainy Hospital, Cairo University (inpatient & outpatient) from May 2017 till October 2018Regarding the study group, they were divided into three groups; 1st (14-20weeks), 2nd (21-30weeks),3rd (31-40week), the transcerebellar diameter, the biparietal diameter and femur length were measured for determination of gestational age. Results: The results of the conducted study showed that the transcerebellar diameter (TCD) is more accurate than the biparietal diameter (BPD), there were significant statistical difference between transcerebellar diameter (TCD)and biparietal diameter (BPD) and also there were significant statistical difference between transcerebellar diameter (TCD) and femure length (FL)   for determination of gestational age in the second and  third trimesters all those data were compared to the last menstrual period. Conclusion: Transcerebellar diameter is more reliable method of gestational age determination in the second and the third trimesters of pregnancy than biparietal diameter. Transcerebellar diameter (TCD) and femure length (FL) can be used as a tool to assist in the assessment of gestational age in the second and the third trimesters. Kay word: (Transcerebellar Diameter- Femur Length- Biparietal Diameter – Gestational Age)