Fenton 2025 Preterm Growth Calculator
Third-generation Fenton preterm growth charts (2025) for infants without abnormal fetal growth. Calculate z-scores and percentiles for weight, length, and head circumference from 22–50 weeks postmenstrual age.
How to interpret Fenton 2025 preterm growth
Enter postmenstrual age (PMA) and the measurement to obtain z-scores and percentiles against the third-generation Fenton reference. This version excludes infants with abnormal fetal growth from the underlying dataset, which may shift percentiles slightly compared with Fenton 2013 for some PMA ranges.
As with any growth reference, serial measurements and clinical context matter more than a single percentile. Use your unit’s adopted chart for documentation and nutrition targets.
Sources and Reference Basis
Fenton 2025 percentile curves are derived from the third-generation Fenton preterm growth meta-analysis. Use alongside unit protocol and serial NICU measurements.
- Fenton preterm growth (third generation) 2025 update to the Fenton preterm growth reference.
- Fenton 2013 calculator on PediaHelper Compare with the widely used second-generation reference.
- Gestational age calculator Compute PMA for chart plotting.
Related NICU Tools
Frequently Asked Questions
When should I use Fenton 2025 vs Fenton 2013?
Fenton 2025 reflects a newer meta-analysis focused on preterm infants without abnormal fetal growth. Use the chart your unit has adopted; many sites still reference Fenton 2013.
What age range does Fenton 2025 cover?
Postmenstrual age from 22 to 50 weeks for weight, length, and head circumference.