1. What is Fetal Weight Percentile?

The fetal weight percentile compares an individual baby's estimated weight to a standard population at the same gestational age. It helps identify babies who may be growing too slowly (small for gestational age) or too quickly (large for gestational age).

2. How Does the Calculator Work?

The calculator uses standardized growth charts based on ultrasound measurements:

Key factors considered:

• Gestational age (weeks)
• Estimated fetal weight (grams)
• Fetal gender (when known)

Explanation: The calculation compares your baby's measurements to thousands of other babies at the same gestational age to determine where they fall in the distribution.

3. Importance of Fetal Growth Monitoring

Details: Tracking fetal growth helps identify potential complications like intrauterine growth restriction (IUGR) or macrosomia, allowing for appropriate monitoring and intervention when needed.

4. Using the Calculator

Tips: Enter accurate ultrasound measurements including gestational age in weeks and estimated fetal weight in grams. For best results, use measurements from a recent ultrasound (within 1-2 weeks).

5. Frequently Asked Questions (FAQ)

Q1: How accurate are fetal weight estimates?
A: Ultrasound estimates have a margin of error of ±10-15%. Serial measurements are more reliable than single measurements.

Q2: What is considered a normal percentile range?
A: Generally 10th-90th percentile is considered normal, but your provider will interpret results in context.

Q3: Does fetal gender affect growth?
A: Male fetuses tend to be slightly larger than females at the same gestational age, which is why gender-specific charts exist.

Q4: When should I be concerned about the results?
A: Always discuss results with your healthcare provider. Percentiles below 10 or above 90 may warrant further evaluation.

Q5: Can this predict birth weight?
A: Late-term ultrasounds (after 37 weeks) become less accurate at predicting actual birth weight.