“…Movement of the diaphragm is easily impeded by gastric distension, so that inter- be of small volume and given at frequent intervals, and this is extravagant of nurses' time. It has been stated that a generous protein and energy intake is necessary to obtain optimal growth in infants of low birth weight (Gordon et al, 1947;Young et al, 1950;Davidson et al, 1967). One cannot say with certainty what is the optimal weight gain for these infants, but it should enable babies whose weight is "appropriate for dates" to return to their initial centiles within a few weeks and most babies "light for dates" to cross the lowest centile lines.…”