The Importance of Accurate Fetal Weight Estimation

Oct 13, 2025 by wbrum.org 92 views

The Accuracy Ratio Between the Risanto, Dare, and Johnson Toshach Formula in Determining the Estimated Fetal Weight in Pregnant Women

Introduction

The measurement of estimated fetal weight (TBJ) during pregnancy is a crucial aspect of antenatal and intrapartum health services. One method used to determine TBJ is by measuring the height of the uterine fundus (TFU), which has a close relationship with the weight of the fetus and reflects the growth and size of the fetus. In areas where ultrasonographic facilities (USG) are not available, TBJ measurement based on TFU is an essential skill for medical personnel in conducting fetal weight screening. However, the accuracy of different formulas used to determine TBJ is still a topic of debate.

The Importance of Accurate Fetal Weight Estimation

Accurate fetal weight estimation is essential for several reasons. Firstly, it helps in identifying high-risk pregnancies and enables healthcare providers to take necessary measures to prevent complications. Secondly, it aids in planning for delivery and ensures that the necessary resources are available. Finally, accurate fetal weight estimation helps in reducing the risk of maternal and fetal morbidity and mortality.

Research Purpose

This study aims to compare the level of accuracy between three formulas, namely the Risanto, Dare, and Johnson Toshach formulas, in determining the estimated fetal weight in pregnant women. Understanding the difference in accuracy is crucial so that medical personnel can use the most appropriate formula in daily practice.

Research Methods

In this study, a cross-sectional study method was used involving 100 pregnant women who would give birth in Human Rights Hospital and USU FK Networking Hospital. Each participant was analyzed using the three formulas to determine TBJ and then compare the accuracy of each formula.

Research Results

Of the 100 research subjects, the majority of pregnant women were in the age category 20-29 years (61%). In terms of the sex of the baby, 41 babies (41%) were born male and 51 babies (51%) were female. The average birth weight of the baby under study was 3106.8 grams, with a standard deviation of 257.2 grams.

Accuracy analysis using the ROC curve shows that:

Johnson Toshach Formula: P = 0.036, Under Curve (AUC) Area of 73.9%, Sensitivity 76.1%, and Specificity of 75.0%.
Risanto Formula: P value = 0.02, AUC 84.5%, sensitivity 81.5%, and specificity of 87.5%.
Dare Formula: P value = 0.02, AUC 85.7%, sensitivity 92.4%, and specificity of 87.5%.

Conclusion

Based on the results of the study, the Dare formula shows the highest level of accuracy in determining the estimated fetal weight compared to the formula Risanto and Johnson Toshach. The high sensitivity of the Dare formula (92.4%) makes it more reliable in clinical practice, especially in areas that do not have access to ultrasound facilities. In addition, these results provide insight for medical personnel in choosing the right method to monitor fetal health during pregnancy.

Implications of the Study

The selection of more accurate formulas not only contributes to maternal and child health but also improves the quality of health services at the community level. Further research is needed to validate these findings and explore other factors that can affect the accuracy of TBJ measurement.

Limitations of the Study

This study has several limitations. Firstly, the sample size was relatively small, and further research is needed to confirm the findings. Secondly, the study was conducted in two hospitals, and the results may not be generalizable to other settings. Finally, the study did not explore other factors that can affect the accuracy of TBJ measurement.

Future Directions

Further research is needed to validate the findings of this study and explore other factors that can affect the accuracy of TBJ measurement. Additionally, studies can be conducted to compare the accuracy of other formulas used to determine TBJ. Finally, studies can be conducted to explore the impact of accurate fetal weight estimation on maternal and fetal outcomes.

Recommendations

Based on the results of this study, the following recommendations can be made:

Healthcare providers should use the Dare formula to determine TBJ in pregnant women.
Further research is needed to validate the findings of this study and explore other factors that can affect the accuracy of TBJ measurement.
Studies can be conducted to compare the accuracy of other formulas used to determine TBJ.
Studies can be conducted to explore the impact of accurate fetal weight estimation on maternal and fetal outcomes.

Conclusion

In conclusion, this study compared the level of accuracy between three formulas, namely the Risanto, Dare, and Johnson Toshach formulas, in determining the estimated fetal weight in pregnant women. The results showed that the Dare formula has the highest level of accuracy, followed by the Risanto and Johnson Toshach formulas. The high sensitivity of the Dare formula makes it more reliable in clinical practice, especially in areas that do not have access to ultrasound facilities. Further research is needed to validate these findings and explore other factors that can affect the accuracy of TBJ measurement.
Frequently Asked Questions (FAQs) About the Accuracy Ratio Between the Risanto, Dare, and Johnson Toshach Formula in Determining the Estimated Fetal Weight in Pregnant Women

Q: What is the estimated fetal weight (TBJ) and why is it important?

A: The estimated fetal weight (TBJ) is a measure of the weight of the fetus during pregnancy. It is an important aspect of antenatal and intrapartum health services as it helps in identifying high-risk pregnancies, planning for delivery, and reducing the risk of maternal and fetal morbidity and mortality.

Q: What are the three formulas used to determine TBJ in this study?

A: The three formulas used to determine TBJ in this study are the Risanto, Dare, and Johnson Toshach formulas.

Q: Which formula shows the highest level of accuracy in determining TBJ?

A: The Dare formula shows the highest level of accuracy in determining TBJ, followed by the Risanto and Johnson Toshach formulas.

Q: What is the sensitivity of the Dare formula?

A: The sensitivity of the Dare formula is 92.4%, which means that it is able to detect 92.4% of the cases where the fetus is at risk.

Q: What is the specificity of the Dare formula?

A: The specificity of the Dare formula is 87.5%, which means that it is able to correctly identify 87.5% of the cases where the fetus is not at risk.

Q: Why is the Dare formula more reliable in clinical practice?

A: The Dare formula is more reliable in clinical practice because of its high sensitivity and specificity. It is able to detect cases where the fetus is at risk and correctly identify cases where the fetus is not at risk.

Q: What are the implications of this study?

A: The implications of this study are that the selection of more accurate formulas not only contributes to maternal and child health but also improves the quality of health services at the community level.

Q: What are the limitations of this study?

A: The limitations of this study are that the sample size was relatively small, and further research is needed to confirm the findings. Additionally, the study was conducted in two hospitals, and the results may not be generalizable to other settings.

Q: What are the future directions of this study?

A: The future directions of this study are to validate the findings and explore other factors that can affect the accuracy of TBJ measurement. Additionally, studies can be conducted to compare the accuracy of other formulas used to determine TBJ.

Q: What are the recommendations of this study?

A: The recommendations of this study are that healthcare providers should use the Dare formula to determine TBJ in pregnant women. Further research is needed to validate the findings and explore other factors that can affect the accuracy of TBJ measurement.

Q: What is the conclusion of this study?

A: The conclusion of this study is that the Dare formula shows the highest level of accuracy in determining TBJ, followed by the Risanto and Johnson Toshach formulas. The high sensitivity and specificity of the Dare formula make it more reliable in clinical practice, especially in areas that do not have access to ultrasound facilities.

Q: What is the significance of this study?

A: The significance of this study is that it provides insight into the accuracy of different formulas used to determine TBJ. It also highlights the importance of accurate fetal weight estimation in maternal and fetal health.

Q: What are the potential applications of this study?

A: The potential applications of this study are in the field of obstetrics and gynecology, where accurate fetal weight estimation is crucial for maternal and fetal health. The study can also be applied in other fields where accurate measurement is essential.

Q: What are the potential limitations of this study?

A: The potential limitations of this study are that the sample size was relatively small, and further research is needed to confirm the findings. Additionally, the study was conducted in two hospitals, and the results may not be generalizable to other settings.

Q: What are the potential future directions of this study?

A: The potential future directions of this study are to validate the findings and explore other factors that can affect the accuracy of TBJ measurement. Additionally, studies can be conducted to compare the accuracy of other formulas used to determine TBJ.