Human Milk Fortifier - Growth Evaluation

Inclusion Criteria: * Birth weight ≤1500 g AND/OR gestational age ≤32 weeks (determined by maternal dates, fetal ultrasound, Dubowitz/Ballard examination or a combination thereof) * Male or female * Tolerating an enteral intake of human milk, donor milk or a combination at ≥100 mL/kg/d for ≥ 24 h * Subject is anticipated to receive human milk, donor milk or a combination for ≥ 3 consecutive weeks after having achieved full fortification with volume intake contained between 150 and 180 mL/kg/d. * Written informed consent has been obtained from the legal representative(s). Exclusion Criteria: * Infants with current systemic disease * Infants with a history of systemic disease * Any congenital anomalies of the GI tract that significantly interfere with nutrition and growth or previous GI surgery. * Small size for gestational age (SGA) - body weight ≦ 5th percentile for that gestational age. * Infants diagnosed with any inherent metabolic disease. * Infants diagnosed with any chromosomic disease. * Receiving any commercial formula supplementation to breast milk. * Receiving steroids at the time of enrollment. * Participation in another nutritional clinical trial that may affect outcomes of this study.