Tool Introduction
This tool is an online fetal weight calculator designed to help pregnant women and doctors estimate the weight of the fetus based on obstetric ultrasound data. It supports a variety of commonly used fetal weight estimation formulas, including the standard formula (Chinese Obstetrics and Gynecology Guidelines), Hadlock formula (four parameters and three parameters), Shepard formula, Warsof formula, and obstetric rapid formula. Users only need to enter the corresponding ultrasound data to quickly obtain the estimated value of the fetal weight.
How to Use
- Select the tab corresponding to the calculation formula you want to use (e.g., Standard Formula (Chinese Obstetrics and Gynecology Guidelines)).
- Enter the data from the ultrasound examination report in the corresponding input boxes. Different formulas require different parameters, so please fill in accurately according to the prompts.
- Click the calculate button, and the tool will automatically calculate and display the fetal weight (estimated).
Input parameter format and requirements:
- Biparietal Diameter (cm): The diameter of the widest part of the fetal head on both sides, must be a number.
- Abdominal Circumference (cm): The length of the fetal abdomen around a week, must be a number.
- Femur Length (cm): The length of the fetal thigh bone, must be a number.
- Head Circumference (cm): The length of the fetal head around a week, must be a number.
All parameters are in centimeters and must be numbers. Some formulas may only require some parameters, please enter according to the requirements of the selected formula.
Output result format:
The calculation results are displayed in the form of a list, including the fetal weight (estimated), in grams.
Example of Use
Example: Calculate fetal weight using the standard formula (Chinese Obstetrics and Gynecology Guidelines)
- Input data:
- Biparietal diameter: 9.5 cm
- Abdominal circumference: 36.5 cm
- Femur length: 7.6 cm
- Expected output result:
- Fetal weight (estimated): approximately 3000 grams (the specific value is subject to the calculation result)
- Operation demonstration:
- Click the “Standard Formula (Chinese Obstetrics and Gynecology Guidelines)” tab.
- Enter 9.5 in the “Biparietal Diameter” input box.
- Enter 36.5 in the “Abdominal Circumference” input box.
- Enter 7.6 in the “Femur Length” input box.
- Click the “Calculate” button. (The actual tool needs a calculate button)
- View the calculation results.
Common Problems
- Q: What input formats are supported?
- A: Only numeric formats are supported, in centimeters.
- Q: What is the output result format?
- A: The output result is the fetal weight (estimated), displayed in a list format, in grams.
- Q: Are there any usage restrictions?
- A: The calculation results are only estimated values and cannot be used as a diagnostic basis. Please consult a professional doctor. Different formulas are suitable for different gestational weeks, please choose according to the actual situation.
Precautions
- Please ensure the accuracy of the input data to avoid deviations in the calculation results due to data errors.
- The applicable range of different formulas may be different, please select the appropriate formula according to your gestational week and doctor's advice.
- This tool only provides estimated values and cannot replace professional obstetric examinations and diagnoses.
- The calculation results may have errors, please consult a doctor for professional evaluation.
