Determination Of Gestational Age In Third Trimester Using Foetal Transcerebellar Diameter And Assessment Of Foetal Growth Using Tcd/Ac Ratio
Journal Title: IOSR Journal of Dental and Medical Sciences (IOSR-JDMS) - Year 2018, Vol 17, Issue 8
Abstract
Objectives:To evaluate the role of fetal transcerebellar diameter (TCD) as an independent parameter in predicting the gestational age in the third trimester of pregnancy. To derive nomogram from sonographically measured foetal transcerebellar diameter for estimating the gestational age in Indian population. Materials and methods:Hospital based prostective study.148 healthy pregnant patient in third trimester were included in the study who underwent obstetric sonography using GE Voluson P8 machine. In all the patients following parameters were obtained - BPD, HC, AC, FL, TCD, foetal heart rate, estimated foetal weight, AFI and placental position. Transverse cerebellar diameter is obtained in the axial plane in the cerebellar view. Gestational age for the measured TCD is obtained from the reference chart by Hill et.al.,TCD/AC ratio was calculated according to the following formula: TCD/AC ratio (%): TCD (mm)/AC (mm) x 100 Conclusion:TCD correlates with clinical gestational age as the first best parameter and also positively correlates with BPD, HC, AC and FL. So TCD can be reliably be used for gestational age assessment in third trimester. TCD/AC ratio remains fairly constant in third trimester with value of 14.59 +/- 2SD, So the ratio is independent of gestational age and can be used in assessing the fetal growth in pregnancies with unknown dating.
Authors and Affiliations
Jayaprakash N, Arun Kumar S, Sangeetha Devi P. S
Keywords
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- EP ID EP381404
- DOI 10.9790/0853-1708105460.
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