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A perinatal growth chart for international reference.

P M Dunn

    Acta Paediatrica Scandinavica. Supplement
    |January 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a simple S-shaped curve model for infant weight gain, focusing on the linear growth phase between 28 weeks gestation and 18 weeks postnatal. This model aids in creating a versatile reference chart for tracking healthy infant growth internationally.

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    Area of Science:

    • Pediatrics
    • Human Growth and Development
    • Biostatistics

    Background:

    • Infant weight and age follow an S-shaped curve, with a linear phase from 28 weeks gestation to 18 weeks postnatal.
    • Fetal growth curve flattening after 40 weeks gestation is often due to growth constraints and typically excluded from standard growth references.
    • Assumptions of normal weight distribution and similar growth velocity in fetuses and infants during this period are key.

    Purpose of the Study:

    • To develop a simple, memorable, and constructible reference chart for tracking infant growth.
    • To establish a standardized method for assessing normal infant weight gain across diverse populations.
    • To account for biological variables like sex and maternal height in growth assessments.

    Main Methods:

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  • Utilized the linear portion of the weight-age curve (28 weeks gestation to 18 weeks postnatal) to define a reference line.
  • Developed a versatile reference chart based on assumptions of normal weight distribution and consistent growth velocity.
  • Incorporated allowances for biological variables such as infant sex and maternal height.

    • Main Results:

    • A versatile reference chart for international use was created, simplifying the assessment of infant growth.
    • The chart allows for categorization of infants, longitudinal growth studies, and population comparisons.
    • The model emphasizes that differences in weight at 28 weeks gestation are the primary differentiator for normally growing fetuses and infants.

    Conclusions:

    • The developed reference chart provides an easy-to-use tool for monitoring infant growth.
    • This method facilitates standardized comparisons of infant growth across different populations and settings.
    • The chart's adaptability allows for consideration of key biological variables, enhancing its clinical utility.