Changes in body proportions over the first year of life: comparisons between ‘light-for-dates’ and ‘appropriate-for-dates’ term infants

Abstract

The ponderal index (PI) has been used to compare changes in body proportions over the first year of life in light-for-dates (LFD) and appropriate-for-dates (AFD) term infants. At birth the mean PI of the LFD infants was significantly lower than that of the AFD infants, but at 1 year there was no significant difference between the two groups. These findings indicate that LFD infants increase their weight relatively more than their length over the first year of postnatal life, to become similarly proportioned to AFD infants.