Nutritional Strategies for Preterm Infant Development

Preterm infants face unique challenges in achieving growth and developmental milestones due to incomplete nutrient stores, immature gastrointestinal function and heightened metabolic demands. Effective nutritional strategies must combine early and optimised enteral feeding with judicious parenteral support, individualised fortification of human milk and careful monitoring of growth trajectories. Early initiation of minimal enteral feeding promotes gut maturation, while progressive trophic feeding balances the risk of necrotising enterocolitis against the need for sufficient amino acids, lipids and minerals. Where enteral intake falls short, standardised parenteral nutrition ensures provision of carbohydrates and essential proteins, though tailored admixtures may be necessary for very low birth weight infants. Fortification of maternal milk—whether standard, adjustable or targeted—addresses deficits in protein, calcium and phosphate, underpinning neurodevelopmental outcomes and bone health. Growth assessment utilises weight Z-scores, length and head circumference plotted against gestational and postmenstrual age references to guide nutritional adjustments. Emerging evidence also underscores the role of predictive modelling to identify infants at risk of metabolic bone disease and neurodevelopmental impairment, enabling early intervention. Globally, consensus guidelines and standardised protocols are streamlining practice, improving growth outcomes and reducing long-term cardiovascular and neurological sequelae among preterm survivors.

Research from Nature Portfolio

Recent studies have refined our understanding of postnatal growth patterns by comparing them directly with intrauterine trajectories. Analysis of large-scale real-world growth measurements in very preterm infants revealed that postnatal weight gain follows a three-phase pattern distinct from fetal curves, with an initial lag, followed by slow length and head circumference growth, then accelerated catch-up. These findings challenge the notion that intrauterine rates are attainable ex utero and support the use of bespoke growth models for clinical assessment and nutrition research. By delineating phases of growth velocity and their divergence from fetal references, this work provides a framework for timing nutritional interventions and evaluating their efficacy.

Nutritional Strategies for Preterm Infant Development publication trend

The graph below shows the total number of articles in nutritional strategies for preterm infant development across all publications each year (not limited to Nature Index journals).

Technical terms

Enteral feeding: Delivery of nutrients directly into the gastrointestinal tract, usually via nasogastric or orogastric tube, to promote gut maturation and nutrient absorption.

Parenteral nutrition: Intravenous provision of macronutrients (carbohydrates, amino acids, lipids) and micronutrients when enteral feeding is insufficient or contraindicated.

Fortification: Addition of concentrated nutrients (protein, minerals) to human milk; standard fortification uses fixed doses, adjustable fortification tailors based on metabolic markers, and targeted fortification is customised to measured milk composition.

Postmenstrual age: Gestational age at birth plus chronological age, used to standardise growth assessments against prematurity-adjusted charts.

Weight Z-score: Statistical measure indicating how an infant’s weight deviates from the mean for their age and sex, expressed in standard deviation units to monitor growth trends.

References

1. A comparative study of postnatal anthropometric growth in very preterm infants and intrauterine growth. Nature Communications (2023).
2. Artificial Neural Network Modeling to Predict Neonatal Metabolic Bone Disease in the Prenatal and Postnatal Periods. JAMA Network Open (2023).
3. Safe and efficient practice of parenteral nutrition in neonates and children aged 0–18 years – The role of licensed multi-chamber bags. Clinical Nutrition (2024).
4. Fortification of Human Milk for Preterm Infants: Update and Recommendations of the European Milk Bank Association (EMBA) Working Group on Human Milk Fortification. Frontiers in Pediatrics (2019).
5. Optimizing Nutrition in Preterm Low Birth Weight Infants—Consensus Summary. Frontiers in Nutrition (2017).
6. Guidelines for Feeding Very Low Birth Weight Infants. Nutrients (2015).