This version was machine-translated from German and has not been medically reviewed. The authoritative version is the German version.

Fenton 2025 Electronic Growth Chart / Electronic Fenton 2025 Growth Chart

Longitudinal course with curves and weight gain per week

Child

Sex

male female

Date of birth

Gestational age at birth

Measurements

Date	Weight (g)	Length (supine) (cm)	Head circumference (cm)

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About this calculator

Multiple measurement points of a preterm infant (weight, length, head circumference) on the Fenton 2025 curves, with z-score trend and growth velocity (g/kg/day and g/week) between measurements.

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Reference and license

Fenton 2025 – weight and head circumference 22.5–50 weeks; length 23.5–50 weeks.
Fenton TR et al. Fenton third-generation growth charts of preterm infants without abnormal fetal growth: a systematic review and meta-analysis. Paediatr Perinat Epidemiol. 2025;39:543–555. License: CC BY-NC-ND 4.0 (Dr. Tanis Fenton, University of Calgary) – non-commercial use only; commercial license via Innovate Calgary. LMS parameters of the Excel calculator v1.1 via a third-party mirror (github.com/zdenecek/perterm-percentiles-fenton); Calgary releases the original Excel file only on request. Source
Third generation of the Fenton charts (meta-analysis excluding children with abnormal fetal growth). Up to 37 weeks the LMS values match the official birth weight cutoffs (Fenton 2025) to ≤ 1 %; from 38 weeks the growth chart differs by design from the size-at-birth table (Calgary: “size-at-birth values differ from the growth charts > 36 weeks”). For classification at birth, completed weeks and the cutoff table are decisive; for monitoring over time, the exact postmenstrual age.

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Note

Calculation aid for healthcare professionals. Percentiles and z-scores describe the position of a measured value in the reference population; clinical assessment remains with the treating physician.

Review date of the German original: 2026-11-05 · Methodology

Frequently asked questions

Fenton 2025 Electronic Growth Chart / Electronic Fenton 2025 Growth Chart: What does this calculator compute?

Multiple measurement points of a preterm infant (weight, length, head circumference) on the Fenton 2025 curves, with z-score trend and growth velocity (g/kg/day and g/week) between measurements.

Fenton 2025 Electronic Growth Chart / Electronic Fenton 2025 Growth Chart: Which sources is this calculator based on?

Fenton TR et al. Fenton third-generation growth charts of preterm infants without abnormal fetal growth: a systematic review and meta-analysis. Paediatr Perinat Epidemiol. 2025;39:543–555.