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Related Experiment Videos

Birthweight doubling time: a fresh look.

C G Neumann, M Alpaugh

    Pediatrics
    |April 1, 1976
    PubMed
    Summary

    Infant birthweight typically doubles by 3.8 months, earlier than commonly believed. Bottle-fed babies and boys reach this milestone sooner, highlighting potential early obesity risks with certain feeding practices.

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    Area of Science:

    • Pediatrics
    • Neonatology
    • Human Growth and Development

    Background:

    • Infant birthweight doubling is a key growth indicator.
    • Current estimates suggest this occurs between 5-6 months.
    • Understanding factors influencing this growth is crucial for infant health.

    Purpose of the Study:

    • To accurately determine the age of birthweight doubling in infants.
    • To identify key variables associated with birthweight doubling time.
    • To assess potential implications for infant growth patterns and obesity risk.

    Main Methods:

    • Study included 357 healthy infants with birthweights between 2,500 and 4,100 grams.
    • Data collected on feeding method (bottle vs. breast) and gender.
    • Age of birthweight doubling was recorded and analyzed.
    • Introduction of solid foods was noted.

    Main Results:

    • Mean age for birthweight doubling was 119 days (3.8 months).
    • Bottle-fed infants (113 days) doubled weight earlier than breast-fed infants (124 days).
    • Boys (111 days) doubled weight earlier than girls (129 days).
    • Solids introduced earlier in bottle-fed (1.9 months) vs. breast-fed (3.9 months) infants.

    Conclusions:

    • Infant birthweight doubling occurs earlier than commonly cited.
    • Feeding method and gender significantly impact growth velocity.
    • Bottle-fed infants show accelerated weight gain relative to length, suggesting potential early obesity.
    • Closer monitoring of infant feeding practices is recommended to mitigate obesity risks.

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