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Birth weight and natural selection.

J Rajanikumari, T Venkateswara Rao

    Human Heredity
    |January 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

    Newborn mortality in Visakhapatnam showed higher selection intensity and selective deaths compared to other studies. Female newborns experienced greater mortality risks than males in the first week of life.

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    Proportion of low birth weight infants in Visakhapatnam (India) and its relationship with maternal age, parity and infants survival.

    Anthropologischer Anzeiger; Bericht uber die biologisch-anthropologische Literatur·1986

    Area of Science:

    • Perinatal health
    • Neonatal mortality research
    • Public health in India

    Background:

    • Birth weight is a critical determinant of neonatal survival.
    • Understanding differential mortality patterns is crucial for targeted interventions.
    • Previous studies provide a baseline for comparison of selection intensity.

    Purpose of the Study:

    • To investigate the relationship between birth weight and mortality in newborns during the first week of life.
    • To quantify selection intensity and selective deaths in a specific Indian population.
    • To compare mortality patterns between male and female newborns based on birth weight.

    Main Methods:

    • Observational study design.
    • Data collection on newborn mortality up to one week of life.

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  • Analysis of mortality rates as a function of birth weight.

    • Main Results:

    • Higher selection intensity and selective deaths were observed compared to existing literature.
    • Mortality rates showed a significant differential pattern based on birth weight.
    • Female newborns exhibited higher selective mortality than male newborns.

    Conclusions:

    • The findings highlight a pronounced effect of birth weight on early neonatal mortality in the study region.
    • Elevated selection intensity underscores the vulnerability of newborns in this population.
    • The observed sex-based difference in mortality warrants further investigation into underlying biological and environmental factors.