NICU · Growth Assessment
Fenton Growth Chart (2025)
Classify size at birth (SGA / AGA / LGA) using the exact published Fenton 2025 third-generation weight cutoffs (22–42 weeks), plus length and head circumference percentile estimates.
Patient
Gestational age at measurement
Weight
Length (optional)
Head circumference (optional)
About Fenton 2025
The Fenton third-generation growth charts (2025) are a 15-country meta-analysis restricted to preterm infants without abnormal fetal growth, improving on the 2013 version. The weight-at-birth cutoffs (3rd/10th/90th percentile, 22–42 weeks) used here are the exact published values from Fenton, Elmrayed & Alshaikh (2025), Paediatr Perinat Epidemiol, DOI: 10.1111/ppe.70035.
Length and head circumference are not yet digitized as exact percentile tables (the 2025 paper publishes them as chart curves, not a data table); those two are estimated using 2013 Fenton reference medians with an assumed distribution — see the method note below.
Enter gestational age and at least weight to calculate percentiles.
Exact 2025 published cutoffs at this GA. Classification is exact; the percentile shown is linearly interpolated between P3/P10/P90 and is approximate.
Method note — length & HC only: these two are estimated from 2013 Fenton reference medians using a normal-distribution approximation (assumed ~5% CV for length, ~4% for HC), not the 2025 update. This tracks the published curves reasonably in the mid-range but can diverge near the tails (<P3 or >P97). Weight above uses the exact 2025 published cutoffs.
Clinical decision support only. Weight classification uses the exact published 3rd/10th/90th percentile size-at-birth cutoffs (22–42 weeks) from Fenton TR, Elmrayed S, Alshaikh BN. "Fenton third-generation growth charts of preterm infants without abnormal fetal growth: a systematic review and meta-analysis." Paediatr Perinat Epidemiol. 2025. DOI: 10.1111/ppe.70035. Source data: University of Calgary / FentonGrowth.ca, published under CC BY-NC-ND 4.0 — reproduced here with attribution for a free clinical tool; contact the authors for other reuse. Length and head circumference are estimated from the earlier 2013 reference (not yet available as an exact 2025 table). For high-stakes or borderline classification, confirm against the official chart at FentonGrowth.ca. PediaSuite is not affiliated with the chart's authors or the University of Calgary.