<qa>  What is the need for more studies that can provide knowledge of growth and weight development in pretermThere are few scientific reports on preterm infants with birth weights between 1500 and 2000g. Adequate and properly balanced supply of nutrients believed to better growth and cognitive development in this patient group, and optimized nutrition is an important part of treatment There is a need for more studies that can provide knowledge of growth and weight development in preterm and small for gestational age SGA infants with a birth weight between 1500 and 2000g. 