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Changes in body proportions over the first year of life: comparisons between 'light-for-dates' and

D P Davies, D Beverley

    Early Human Development
    |September 1, 1979
    PubMed

    Insights

    Light-for-dates infants show catch-up growth in body proportion by one year of age. Initially smaller, their weight gain relative to length equalizes them with appropriate-for-dates infants.

    Area of Science:

    • Pediatrics
    • Neonatalogy
    • Human Growth and Development

    Background:

    • The ponderal index (PI) is a measure of body proportionality.
    • Infants born light-for-dates (LFD) may have different growth trajectories compared to appropriate-for-dates (AFD) infants.

    Purpose of the Study:

    • To compare changes in body proportions, using the ponderal index, between LFD and AFD infants during the first year of life.

    Main Methods:

    • Calculation of the ponderal index (PI) at birth and at 1 year of age.
    • Comparison of mean PI values between LFD and AFD infant groups.

    Main Results:

    • At birth, LFD infants had a significantly lower mean PI than AFD infants.
    • By 1 year of age, there was no significant difference in mean PI between the two groups.
    • LFD infants demonstrated a greater relative increase in weight compared to length.

    Conclusions:

    • LFD infants exhibit catch-up growth in body proportion within the first year.
    • Postnatal growth allows LFD infants to achieve similar body proportions to AFD infants by age one.

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