PediTools: Fenton 2013 12+

Premature infant growth chart

Joseph Chou

Designed for iPhone

    • 5.0 • 9 Ratings
    • Free

iPhone Screenshots


Developed for pediatric clinical providers, this app uses the 2013 Fenton growth charts for premature infants between 22 4/7 and 50 0/7 weeks gestation to report percentiles and Z-scores for weight, length, and head circumference.

The Fenton 2013 preterm growth charts are based on systematic review and meta-analysis of population-based, gender-specific preterm measurements at birth of weight, length, and head circumference references from developed countries. The chart was smoothed to avoid discontinuity between the preterm datasets and the World Health Organization (WHO) Growth Standard, to promote an improved transition between preterm and WHO growth charts. This implementation uses LMS parameters (skew, median, and standard deviation) to allow calculation of precise percentiles and Z-scores.


• gender-specific, from 22 4/7 to 50 0/7 weeks gestation
• calculation of percentile and Z-scores for weight, length, and head circumference
• alert for small (less than 10th percentile) or large (greater than 90th percentile) for gestation
• displays growth needed to maintain current percentile
• convenient buttons to display 10th, 50th, and 90th percentile measurements
• slider selection to display measurement between 1st and 99th percentile

What’s New

Version 1.1.1

• Fixed minor user interface glitches

• Added growth needed to maintain current percentile
• UI layout changes
• Fixed bug with boy head circumference when gestation ended with 6/7 or 0/7 days

Please let us know what features you'd like in future versions!

Ratings and Reviews

5.0 out of 5
9 Ratings

9 Ratings

Charna S. ,

Great app!

This app is extremely helpful for daily rounds to quickly assess growth and nutritional adequacy. Super user-friendly and highly recommend to all nicu RDs and neonatologists.

hbhb1919 ,

Love it!

Thanks for adding the growth velocity this is particularly helpful for malnutrition assessment!
Very easy to use and so glad it’s available!

NICUAmanda ,

Good app, room for improvement

Love that this is an app now, super convenient! Would recommend adding the expected weekly growth that’s also found on the website. Thanks for making this!!!

Developer Response ,

Thank you for the feedback! Expected weekly growth has been added to v1.1, now available.

App Privacy

The developer, Joseph Chou, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.

More By This Developer

You Might Also Like