Donald School Journal of Ultrasound in Obstetrics and Gynecology

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VOLUME 4 , ISSUE 4 ( October-December, 2010 ) > List of Articles


Fetal Transcerebellar Diameter to Abdominal Circumference Ratio (TCD/AC) in the Assessment of Normal Fetal Growth

MB Bellad, Hema Dhumale, Yeshita V Pujar, Jyotsana C Shravage, Bhavana Y Sherigar, Geeta S Durdi, Sheetal S Amber

Keywords : Transverse cerebellar diameter/Abdominal circumference ratio (TCD/AC ratio),Ultrasonography,Fetal growth,Intrauterine growth restriction

Citation Information : Bellad M, Dhumale H, Pujar YV, Shravage JC, Sherigar BY, Durdi GS, Amber SS. Fetal Transcerebellar Diameter to Abdominal Circumference Ratio (TCD/AC) in the Assessment of Normal Fetal Growth. Donald School J Ultrasound Obstet Gynecol 2010; 4 (4):455-457.

DOI: 10.5005/jp-journals-10009-1166

License: CC BY-NC 4.0

Published Online: 01-09-2011

Copyright Statement:  Copyright © 2010; The Author(s).



To derive population specific transverse cerebellar diameter/abdominal circumference ratio (TCD/AC ratio) for the assessment of normal fetal growth.

Materials and methods

A one-year prospective observational study conducted at the KLE University's teaching hospital, Belgaum. The TCD/AC ratio was calculated for 434 obstetric patients, who met the inclusion criteria and the arithmetic mean and 1 standard deviation (SD) was calculated for the population studied.


Within the study population, the TCD/AC ratio assessed for normal fetal growth with gestational age ranging from 18 to 34 weeks was found to be a constant with a mean of 13.56 +/− 1.21(1 SD).


A normal standard value to assess normal fetal growth is required for a given set of population in order to be compared with those fetuses with intrauterine growth restriction (IUGR). The TCD/AC value in our study remained a constant between gestational ages ranging from 18 to 34 weeks with a mean of 13.56 +/− 1.21.

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