抄録
The protein, sugar, and lipid concentrations were measured in 255 samples of human breast milk that were provided longitudinally by 33 women following childbirth. Longitudinal changes, the relationship among the three nutrients and the amounts of infant intake were analyzed. The protein concentration was highest in colostrum and decreased thereafter. In contrast, the sugar and lipid concentrations were at their minimums in colostrum. The protein concentration exhibited a significantly positive correlation with the lipid concentration, where as both were significantly negatively correlated with the concentration of sugar. The PFC-ratios of human breast milk were almost the same as the ratios calculated from the Recommended Dietary Allowance for the Japanese (5th Division) pertaining to the first six months postpartum, the ratio of protein in human breast milk subsequently declining. It was presumed that an infant's intake of the three nutrients and the infant's energy increased in volume each day for the first five weeks postpartum.
