Anderson G H, Atkinson S A, Bryan M H
Am J Clin Nutr. 1981 Feb;34(2):258-65. doi: 10.1093/ajcn/34.2.258.
The lactose, lipid, protein, and total energy content of milk produced during the first 4 wk of lactation was determined in milk from mothers giving birth prematurely and at term. Milk samples analyzed were representative of complete 24-h expressions. Over the first 4 wk of lactation lactose concentration increased, but nitrogen concentration decreased by an average of 25%. Lipid and total energy concentration increased by 25% from the 1st to 2nd wk and then remained stable in both groups. Although these changes with duration of lactation were similar in both groups, premature compared to full term milk was consistently 20 to 30% higher in total energy and lipid concentration, 15 to 20% higher in total protein and, after the 1st wk, approximately 10% lower in lactose. By comparing predicted nutrient intakes to estimated requirements of premature infants fed 150 to 200 ml/kg/day of their own mothers' milk, we predict that the quantities of protein and energy provided would be adequate to meet the needs of the infant during the early weeks of life.
测定了早产和足月分娩母亲产后前4周所产母乳中的乳糖、脂质、蛋白质及总能量含量。所分析的母乳样本代表了24小时的完整泌乳量。在泌乳的前4周，乳糖浓度升高，但氮浓度平均下降了25%。脂质和总能量浓度在第1周到第2周增加了25%，然后在两组中均保持稳定。尽管两组中这些随泌乳时间的变化相似，但与足月母乳相比，早产母乳的总能量和脂质浓度始终高出20%至30%，总蛋白高出15%至20%，且在第1周后乳糖含量约低10%。通过将预测的营养素摄入量与喂养150至200毫升/千克/天自身母亲母乳的早产儿的估计需求量进行比较，我们预测，所提供的蛋白质和能量数量足以满足婴儿生命早期的需求。
