Estimation of fetal weight in utero by Dawn's formula and Johnson's formula: a comparative study

Authors

  • Mallikarjuna M. Department of Obstetrics & Gynaecology, Subbaiah Institute of Medical Sciences, Shimoga, Karnataka, India
  • Rajeshwari B. V. Department of Obstetrics & Gynaecology, Kamineni Institute of Medical Sciences, Narketpally, Nalgonda, Telangana, India

DOI:

https://doi.org/10.18203/2320-1770.ijrcog20151130

Keywords:

Birth weight, Johnson formula, Dawn formula

Abstract

Background: Survival of the premature infant has been shown to be related more to fetal weight than to any other consideration. A lot of work has been done to find out accurate methods for estimation of fetal size and weight in utero.

Methods: This study consists of total 200 case studies included patient of different parity all delivered in these hospitals either vaginally or by caesarian section. Two methods of estimation of birth weight were assessed and compared.

Results: 33.5% of cases were within ±100gms by Johnson's formula, whereas in Dawn's formula 51.5% cases were within +100 gm of actual birth weight.73% of cases by Johnson's formula were within ±250 gms and 88.5% of cases by Dawn's formula were within ±250 gms of actual birth weight.91% of cases by Johnson's formula and 99% of cases by Dawn's formula were within ±500 gms of actual birth weight.

Conclusions: Dawn's formula was found to be more accurate (88.5% within ±250 gms) than Johnson's formula (53.5% within ±250 gms) in prediction of antenatal fetal weight.

References

Watroven GE, Mkaije R, Van Douglas PWJ, Van Asten AGH, Dolmane NMV. Clinical estimation of fetal weight.Br J Obstet Gynec. 1995;102:525.

Dare FO, Adernowore AS.Standards of fetal growth for USA. Gynaecol Obstet. 1990;31(3):243-8.

Miller M, Kissling GE, Korndoffer FA. A cross sectional study of in-utero growth of the above average sized fuetus. Am J Obstet Gynaecol. 1986;155:1052-5.

McSweeney D. Volume of Uterus during Labour and its correlation with birth weight. Am J Obstet Gynec. 1958;76:1279.

Insler V, Bernstein D, Riliover M, Segal T. The problem of low birth weight and prematurity. Am J Obstet Gynec. 1967;98:292.

Stockland L, Marks SA. analysis of Birth weight as a predictor of perinatal outcome. Am J Roentegenol. 1961;86:425.

Campbell S, Wilkin D. ultrasonic measurement of fetal abdominal circumference brit J Obstet Gynec. 1978;82:689.

Dawn CS, Modak GO, Ghosh. Antenatal care for normal pregnancy. A. J Obstet Gynec. 1983;33:133.

Johnson RW, Toshach CE. Estimation of fetal weight using longitudinal mensuration. Am J Obstet Gynec. 1954;68:891.

Vimla, Sushila. Clinical estimation of fetal weight.The Journal of Obstetrics and Gynaecology of India. 1987;37:54-8.

Downloads

Published

2017-02-19

Issue

Section

Original Research Articles