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Estimation of Gestational Age by Real Time Ultrasonography (Biparietal Diameter and Head Circumference) to Estimate the Fetal Morphometry in IInd and IIIrd Trimester

Bichitrananda Roul*** , Sangeeta Khare* , Manik Chatterjee** , Bichitrananda Roul*** , Hulesh Mandle****

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Indian Journal of Anatomy 4(3):p 123-128, Sep-Dec 2015. | DOI: DOI:https://dx.doi.org/ 10.21088/ija.2320.0022.4315.3

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Abstract

The growth of the human fetus is a complex process resulting in an increase in size over time, has been the subject of extensive study. Before the advent of ultrasound evaluation. Physician interested in the growth process of the fetus could only look at the infant at delivery and infer what had happened in utero. Based on these observations clinicians were able to categorize fetuses in very general terms on the basis of their age and size. In the second and third trimester of pregnancy the fetus has grown sufficiently in size so that extreme anatomic details is visualized. There are number of structures that can be identified and measured during this time, but the basic fetal measurement used to estimate age and weight with ultrasound are-Biparietal Diameter (BPD), Head circumference (HC). This study was performed in Department of Anatomy in close association with the Department of Radiodiagnosis, Pt. J. N. M. Medical College, Raipur, Dr. B. R. Ambedkar Memorial Hospital, Raipur (C.G.). The ultrasonographic examination comprised of recording of, Biparietal Diaeter (BPD), Head Circumference (HC). The fetal growth parameters i.e. BPD, HC, of every patient were measured serially using real time ultrasonographic examination. The mean of all measurement were tabulated, and were compared individually with western nomograms. The accuracy of the individual parameter for different weeks of gestation was noted. This accuracy indicated that, the correctly diagnosed gestational age by sonographic parameters are not equally homologous with known menstrual age. The comparisons concludes that, out of the mean value of all parameters, the minimum discrepancy was found in biparietal diameter, for the prediction of gestational age.

Keywords: Biparietal Diaeter (BPD); Head Circumference (HC); Ultrasonography. 

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DOI: DOI:https://dx.doi.org/ 10.21088/ija.2320.0022.4315.3

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