Early Growth Patterns in Preterm Infants Redefine Long-Term Health Risks
A new study published in Pediatric Research in May 2026 sheds light on how early growth patterns shape long-term health in preterm infants. Researchers led by Das et al. examined how weight and length gains in the first two years affect body composition at 24 months. Their findings challenge long-held assumptions about growth in moderate-and-late preterm babies—those born between 32 and 36 weeks gestation. The team focused on a group often overlooked in research: moderate-and-late preterm infants. Unlike extremely preterm babies, this demographic has received less attention, despite their rising numbers. Using advanced tools like dual-energy X-ray absorptiometry (DXA) and air displacement plethysmography, the study precisely measured fat and lean mass in the children.
The research revealed that rapid weight gain, when not matched by linear growth, led to higher fat accumulation by age two. Conversely, steady growth velocity in the early months boosted lean mass development. A key discovery was the existence of distinct subgroups within this preterm population, each showing different growth trajectories and body composition outcomes. Das and colleagues applied a conditional growth modelling approach to track how growth spurts at specific times related to earlier development. This method highlighted that simply 'catching up' in size does not guarantee healthy body composition. Instead, the timing and nature of growth increments play a critical role. The study suggests that routine neonatal check-ups should include early conditional growth assessments. Identifying infants at risk of unfavourable fat distribution could allow for earlier interventions, potentially improving long-term health.
The findings underscore the importance of monitoring growth quality, not just quantity, in preterm infants. By integrating precise body composition analysis into follow-up care, clinicians may better support healthy development. This research marks a step toward more targeted interventions for a growing but understudied group of children.
