Correlation of ultrasonographic estimated fetal weight with actual birth weight in a tertiary hospital in Lagos, Nigeria.

Abstract

Background: Sonographic fetal weight estimation is an important component of antenatal care. Aim: To sonographically estimate fetal weight at term and to compare estimated with actual birth weights to determine the validity of estimated fetal weights. Subjects and methods: In the prospective study, a convenience sample of 282 women was recruited. Ethical approval and informed consent of patients were obtained. An experienced sonographer estimated fetal weights by measuring BPD, HC, AC and FL using a scanner with Hadlock 3 weight estimation model. Actual birth weights were measured with a Crown weighing scale by a midwife. Data was analyzed with SPSS software version 17.0 while descriptive and inferential statistics were used to interpret results. Results were tested at error level set at p≤ 0.05. Results: Mean estimated and actual birth weights were 3378±40g and 3393±60g respectively. Difference between the two means was not significant. Eleven percent of fetuses were sonographically estimated to be microsomic while 14.5% were microsomic at birth; 12.1% were sonographically estimated to be macrosomic but 15.2% were macrosomic at birth. Most macrosomic fetuses were delivered through cesarean section(CS) and fetal weights increased with maternal age and parity. Conclusion: Sonographically estimated fetal weight using Hadlock 3 weight estimation model without validation correlated positively with actual birth weight in a Nigerian population.

Accuracy of sonographic fetal weight estimation in a tertiary care hospital in Bharatpur, Nepal

“…In our study, there was a strong positive correlation between EFW and ABW and there was no statistically significant difference between mean EFW and mean ABW (r=0.71, p <0.001) which was similar to the studies done by Dimasi et al11 (r= 0.79), Frieri et al 15 (r=0.96), Lafont et al 13 (r=0.79) and other studies done by Simms et al 9 and Cletus et al 6 Our result, therefore, seems to agree with the opinion of some authors who reported that the use of ultrasonography to predict fetal weight was accurate in those populations.…”

“…5 Many studies have been carried out in America, Europe, and Asia which compared sonographically estimated fetal weights (EFWs) with actual birth weights (ABWs) of fetuses in order to determine the accuracy of EFWs in the respective population. 6 To the best of our knowledge, data on the weight of Nepalese fetuses are sparse, and data on the correlation of sonographically estimated fetal weights with actual birth weights, in order to establish the effectiveness of estimation models in the country, is even sparser. This study was, therefore, carried out to determine the accuracy and thus the reliability of Hadlock (BPD, AC) fetal weight estimation algorithm in College of Medical Sciences, Bharatpur.…”

Comparison of ultrasonographic estimated fetal weight and actual birth weight.

“…This was similar to the mean actual birth weight of 2.9±0.28 kg reported by Dr M. Muralisree et al (2015) in Nigeria 9 and slightly lower than 3.24±0.50 reported by Charles Njoku (2014) in South Nigeria 10 and 3.393±0.60 kg reported by Cletus (2015) in Nigeria. 11 However, it is slightly higher than 2.817±0.78 kg reported by Sabrina Q (2015) in Bangladesh. 12 The reason may be due to several factors affecting birth weight for example socioeconomic and regional factors.…”

Correlation of ultrasonographic estimated fetal weight with actual birth weight at a rural setting

“…These results are in line with the studies conducted elsewhere which found the Hadlock formulas to be the most accurate in estimation fetal weight. 17,18,[19][20][21][22][23][24]…”