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iConcept Journal of Emerging Issues in Medical Diagnosis and Treatment
iConcept Journal of Emerging Issues in Medical Diagnosis and Treatment
Eugenia Giannopoulou
iConcept Press

iConcept Journal of Emerging Issues in Medical Diagnosis and Treatment

Fetal Abdominal Circumference – the best parameter for detecting macrosomia

by Emmanuel Mador, Ishaya Chuwang Pam and John Oluwole Ogunranti

Volume: 5 (2016); Issue: 2
Status: Copy Editing and Typesetting


Fetal Abdominal circumference has not been studied thoroughly in Nigeria. To a large extent, the preceding Nigerian studies regrettably used relatively small sample size which could not give statistically significant relationship between abdominal circumferences and biparietal diameter, occipitofrontal diameter, head circumference, estimated fetal weight, symphysiofundal height and gestational age. In a prospective cross-sectional study conducted at the centre for reproductive health research Jos, the reference charts for abdominal circumferences were constructed from 13,740 normal Nigerian fetuses and the result presented in a tabular form together with standard deviation of mean, standard error of mean as well as the corresponding centiles. Correlation and regression analysis revealed that there is a positive polynomial correlation between gestational age and abdominal circumference with a correlation of determination r2 = 0.9995 (P < 0.0001) in Nigerian fetuses. The relationship is best described by the fourth order polynomial regression equation y = – 0.0004x4 +0.0349x3 – 1.2485x2 + 30.598x – 172.02 where y is the abdominal circumference in millimeters and x is the gestational age in weeks. The mean weekly increase in the fetal abdominal circumference in the 4th month of life was 11.98mm/week, in the 6th month; it was 11.36mm/week and 8.12mm/week in the 9th week. Reference centiles were compared with published data from other parts of the world. Our derived centiles were lower than those from Western studies which may partly be due to racial differences. This emphasizes the need to develop fetal anthropometric charts specifically for each region.

Author Details

Emmanuel Mador
A, University of Jos, Nigeria
Ishaya Chuwang Pam
Obstetrics & Gynaecology, Jos University Teaching Hospital, Nigeria
John Oluwole Ogunranti
Anatomy, University of Jos, Nigeria

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