Abstract
In the present paper, fat content of 565 samples out of 304 nursing mothers were examined and the following questions were studied.
1. As to hunt an milk fat content according to the intensity of Arakawa's reaction, human milk negative to Arakawa's reaction is generally higher in fat content (3.85% Cf. Table 7) than the Arakawa-positive milk (2.84% Cf. Table 7).
2. If all the milk samples are distributed according to the intensity of Arakawa's reaction and according to the amount of fat, and if a dissecting line is drawn between 3.5%, 70% of Arakawa-positive milks have lower fat content than 3.5%, while 39% of completely Arakawa-negative milks show lower fat content than 3.5%, and fat content of Arakawa-negative milks fluctuates in a wider range than that of Arakawa-positive milk.
3. Concerning the relation between milk fat and different Arakawa's reaction in one and the same mothers, it has been shown that generally milk fat was higher in the breast with weaker Arakawa's reaction.
4. In the cases of one and the same mothers with very different reaction on different sides of the breast, 100% of the cases have shown higher fat content on the weaker side of Arakawa's reaction.
5. As to the variation of milk fat according to age of infant, generally I saw a higher fat content in late milk except in the Arakawa-positive group. Arakawa-positive milk has shown lower fat content even in late milk. It will be noteworthy too that the average fat content in the first 3 months of completely Arakawa-negative milk has shown rather a low.value.
6. There was no significant difference of milk fat according to the age of mothers.
7. It seems to me that milk fat was slightly higher in hot season than in cold season, but the difference was too small to attribute any significance to it.
8. Fat content was higher on the side of poorer secretion in one and the same mothers.
9. Fat content was higher in the milks from different women complaining of poor milk secretion on both sides of the breast.
10. A hypothesis or rather a possibility has been proposed to explain the conflicting results of different authors and the possible relation between human milk fat on one hand and infantile beriberi and B-avitaminoti dyspipsia on the other.
