Thomas M R, Pearsons M H, Demkowicz M, Chan I M, Lewis C G
Acta Vitaminol Enzymol. 1981;3(3):135-44.
The vitamin E, vitamin A and beta carotene concentrations of milk, from eight mothers delivering premature infants and ten mothers delivering full term infants were determined and compared. Milk samples were collected three times per day on days 3, 9, 15, 21, 27 and 33 postpartum. Dietary records were kept on days 2-3, 14-15, and 32-33. There was no significant difference in vitamin E, vitamin A and beta carotene levels between the two groups. The mean retinol concentration was higher in the milk of mothers of premature infants on all days except day three. The highest mean carotene and retinol concentrations in the milk of mothers of full terms infants were on day three: but the peak occurred in the preterm group on day nine and did not drop as rapidly as the milk retinol of the full term group. The milk of mothers of fullterm infants, day 3 vitamin E concentration was significantly higher than days, 15, 21, 27 and 33 postpartum. There were no significant differences in the dietary intake of the full term and preterm groups. The amount of vitamin E in the milk was not affected by dietary vitamin E intake of the subjects regardless of gestational age of the infant. More research is needed to determine the exact quantity of vitamin A and E ingested by the premature infants if breastfed by their respective mothers.
测定并比较了8名早产产妇和10名足月产产妇乳汁中的维生素E、维生素A和β-胡萝卜素浓度。产后第3、9、15、21、27和33天,每天采集3次乳汁样本。在第2 - 3天、14 - 15天和32 - 33天记录饮食情况。两组的维生素E、维生素A和β-胡萝卜素水平无显著差异。除第3天外,早产产妇乳汁中的平均视黄醇浓度在所有天数均较高。足月产产妇乳汁中最高的平均胡萝卜素和视黄醇浓度出现在第3天,但早产组在第9天出现峰值,且下降速度不如足月产组的乳汁视黄醇快。足月产产妇乳汁在产后第3天的维生素E浓度显著高于第15、21、27和33天。足月产组和早产组的饮食摄入量无显著差异。无论婴儿的胎龄如何,乳汁中维生素E的含量不受受试者饮食中维生素E摄入量的影响。如果早产婴儿由其各自的母亲母乳喂养,还需要更多研究来确定早产婴儿摄入的维生素A和E的确切量。