女児の心身発達の相関に関する研究

第3報初経の早発化とその影響因子

抄録

With regard to Japanese girls in Tokyo, we have surveyed menarche age and its correlations with their height, weight, circumference of the chest, width of shoulders (Breite zwischen den Akromien), pelvic width (Distantia Cristarum), and environmental elements annually for the period of three years.
This time we report a notable tendency of accelerated menarche; girls who have shown accelerated menarches are found much in C body type which, compared with the average of their year, their height are extreme and their weight are considerable, and delayed menarche are found much in K type which, compared with the average of their year, their height are low and their weight are small.
The correlation between the cube of pelvic width and days after menarche is high. But there is still room for investigation. The environmental factors stimulating the beginning of menarche are not found, nor can we gain any information to predict of menarche.