Tutorial

1. Create a patient session
Select Singleton or Twin.
2. Enter measurement
Enter Measurement Date and POG / POA in W+D format, for example 20+0 or 32+6.
3. Enter ultrasound measurements
Enter the relevant BPD, HC, AC, FL, EFW and other measurement fields.
4. Save measurement
Saved measurements remain only in the current browser session. Refreshing or closing the page clears the session data.
5. Review growth charts
Use the parameter buttons to view BPD, HC, AC, FL or EFW. Serial measurements are plotted against the WHO mathematical centile curves.
6. Twin charts
Twin A and Twin B are plotted separately. EFW discordance is shown in Measurement History from the recorded Twin A and Twin B EFW values.
7. Print
Use the Print button in the Growth Chart section when the required measurements have been entered.

Resources & References

WHO Fetal Growth Standards

Kiserud T, Piaggio G, Carroli G, Widmer M, Carvalho J, et al. The World Health Organization Fetal Growth Charts: A Multinational Longitudinal Study of Ultrasound Biometric Measurements and Estimated Fetal Weight. PLOS Medicine. 2017;14(1):e1002220. DOI: 10.1371/journal.pmed.1002220.

Coefficient Source

Carvalho J. whoFetalGrowth — public coefficient implementation/source trail used by the WHO fetal growth calculation engine.

Parameters

BPD, HC, AC, FL and EFW are plotted using the mathematical coefficient engine carried forward from the Department Version. Centile curves shown are the 5th, 25th, 50th, 75th and 95th centiles.

Disclaimer

This is an independent implementation of the WHO fetal growth reference calculation engine. It is NOT an official WHO application.

This public version is designed for session-only use. No patient-identifying information is requested, stored in a server-side database, Google Sheets, Google Drive or browser persistent storage.

Twin pregnancies should be interpreted using an appropriate validated twin reference standard.

The chart does not provide diagnosis, treatment recommendations or invented clinical thresholds. Clinical interpretation remains the responsibility of the treating clinician.