 Hypothesis: If the composition of the mother s milk is modified on the basis of her diet, a mother supplementation with high doses of DHA will increase proportionally the levels of this fatty acid in her milk, fact that will allows the premature newborn child receive a major dose of this fatty acid, and therefore this way, we will manage to improve the neuronal and visual development and to take part on the inflammatory process, oxidative damage and its evolution, together with the development or bone mass increase in the premature baby. 