 Its known that Docosahexaenoic acid DHA and all Polyunsaturated Fatty Acids PUFA are important in neurodevelopment of term and preterm infants. This study tried to determine the utility of a balanced contribution of DHA and Arachidonic acid AA omega-6omega-3 in milk formula, with a ratio similar to that found in breastfeeding, equal to 2, in very premature infants less than 1500 grams and or less than 32 weeks of gestational age. To evaluate values of fatty acids they have in blood and psychomotor development they achieve. 