Comparison between transcerebellar diameter with biparietal diameter and femur length for gestational age measurement accuracy in third trimester of pregnancy / Mohamed Alaa Eldin Ahmed Maher ; Supervised Maha Mosaad , Mariam Abdelnabi , Nevine Elghamry

Thesis (M.Sc.) - Cairo University - Faculty of Medicine - Department of Gynecology and Obstetrics

Many patients in our country come for their first antenatal care visit in their third trimester not remembering their LMP or their EDD which makes it very difficult for the physician to assess their gestational age. In this study we compare between the Transcerebellar diameter and biparietal diameter and femur length in accuracy of assessment of gestational age in third trimester. This study included 200 patients sure of their dates and fulfilling the inclusion criteria at the department of obstetrics and gynecology, Kasr Alainy Cairo university starting from June 2015 till March 2016,the whole patients were pregnant in their third trimester and the transcerebellar diameter and Biparietal diameter and Femur length were measured. TCD was accurate within 1 week in 90% of the cases and was accurate within 3 days in 59% of the cases. While the FL was accurate within 1 week in 80% of the cases and was accurate within 3 days in 46% of the cases. Finally the BPD was accurate within 1 week in 60 % of the cases and within 3 days in 29.5% of the cases. TCD is the most accurate method for assessment of gestational age in third trimester followed by FL, and the least accurate is the BPD. Also by combining accuracy of TCD (90%) and that of FL (80%) we can be near certain of gestational age in most of our patients even if they are unsure of their dates

Issued also as CD