Individualized Maternal Milk Fortification for Feeding the Preterm Infants

Proteins are of the most important macromolecules in living organisms participating in almost all biological processes. Premature infants are forced to adapt to a new (extrauterine) environment where supply of nutrients, including amino acids, from mother ceases abruptly. Consequently, the aim of neonatologist is the appropriate, quantitatively and qualitatively nutritional support, to promote brain development, achieve normal endocrine and metabolic function, maintain a growth rate similar to the intrauterine one avoiding extrauterine growth restriction during postnatal period and at the same time encouraging the analogue modulation of body composition (increased muscle mass, decrease body fat, hydration).

Malnutrition or inadequate nutrition of preterm infant which remains undiagnosed and without proper treatment could have serious consequences on psychomotor development and metabolic activity. Indeed, 75% of low birth weight premature infants exhibit extrauterine growth restriction at discharge, even when they have achieved growth equal to the considered satisfactory, ie 15g/kg/day.

Beyond anthropometrics differences between preterm and full-term newborns, body composition varies as well. Preterms have higher percentage of body fat and decreased muscle mass at term time compared with full term neonates. However, it has not been clarified whether this differentiation is harmful predisposing to chronic diseases later in childhood or adult life (eg. obesity, metabolic syndrome).