Preterm infants are at high risk of future adverse neurodevelopment and suboptimal postnatal growth. Maintaining optimal growth, imitating that of the foetus, is challenging in the population of premature newborns, especially those with very low birth weight (< 1500 g). Due to a lack of consensus on the definition of postnatal growth faltering, determining its true incidence remains difficult. Longitudinal and careful anthropometric assessment continues to play a crucial role in evaluating well-being in the neonatal intensive care unit. Genetics, socioeconomic factors, and morbidities influence growth. The risk factors of postnatal growth faltering in preterm infants include the following: neonatal morbidities, e.g., bronchopulmonary dysplasia, necrotising enterocolitis, and inadequate nutritional support. Some studies suggest that growth faltering is associated with neurodevelopment and long-term metabolic outcomes, but the origins of these conditions are multifactorial.