抄録
The authors have studied the growth of infants in order to plan infants' clothes. In this report, the relative growth of each part of the body to stature and chest girth is investigated with the allometry equation y=bxα in which stature or chest girth is taken as x and other items as y. The materials were collected cross-sectionally from the babies aged 1 to 12 months in 1973.
The results are summarized as follows.
1) As for the relative growth to stature, upper and lower extremity length in both sexes and biacromial width in female show monophasic. The items which show diphasic are weight, foot length in both sexes and biacromial width in male. Maximum hip width in both sexes is triphasic. The period of phase shifting, that is, the critical point of each item is observed at 3-4 months when stature is 61-64 cm.
2) As for the relative growth to chest girth, abdominal girth in male is monophasic. That of female shows diphasic and critical point is observed at 1-2 months when chest girth is about 40 cm. Hip girth in both sexes is diphasic and at 3 months the critical point is observed when chest girth is about 43 cm.
