Introduction: The use of greater amounts of protein and energy during the first week of life is associated with hypophosphataemia in extreme preterm babies. The lowest phosphorus levels are described in intrauterine growth restricted (IUGR) babies.
Objectives: To describe biochemistry levels in cord blood plasma in extreme premature, adequate and small for gestational age babies (AGA/SGA) and their relationship with plasma calcium and phosphorus levels during the first week of life.