Given the association between mother 's own milk and neurodevelopment , it is important to ascertain whether provision of human donor milk as a supplement may yield superior neurodevelopmental outcomes compared to formula.Our primary hypothesis is that VLBW infants fed pasteurized donor milk compared to preterm formula as a supplement to mother 's own milk for @ days or until hospital discharge , whichever comes first , will have an improved cognitive outcome as measured at @ months corrected age on the Bayley Scales of Infant Development , @ ( rd ) ed .