There are relatively few recorded data on the external dimensions of new-born infants. A few dimensions were measured by Quetelet,1 Daffner,2 Weissenberg,3 Friedenthal4 and Schreiber.5 The only extensive study reported in the literature is that of Kugler,6 made in 1931.
Averages, standard deviations and coefficients of variation for thirty-three dimensions by sex and order of birth are shown in the table. The external dimensions are larger in males than in females and larger in later-born than in first-born infants. The proportion of the dimensions7 to the total body length is identical in all the groups of new-born. There is no sex difference in the variability of the various dimensions.
These measurements were made, for the most part, at Bellevue Hospital and the Fifth Avenue Hospital. Infants born at Bellevue Hospital come almost exclusively from poor homes, delivery and hospitalization being free,