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Paternal contribution to birth weight.

P Magnus1, H K Gjessing, A Skrondal

  • 1Department of Population Health Sciences, National Institute of Public Health, Oslo, Norway. per.magnus@folkehelsa.no

Journal of Epidemiology and Community Health
|November 15, 2001
PubMed
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Paternal birth weight significantly impacts offspring low birth weight risk. This study estimates birth weight heritability at 0.25, suggesting genetic and environmental influences on birth weight variation.

Area of Science:

  • Human genetics
  • Reproductive health
  • Pediatrics

Background:

  • Understanding birth weight determinants is crucial for infant health.
  • Limited data on paternal birth weight has hindered comprehensive analysis.
  • Parental factors, including paternal influence, contribute to birth weight variability.

Purpose of the Study:

  • To estimate the risk of low birth weight based on parental birth weights.
  • To determine father-mother-offspring correlations for birth weight.
  • To elucidate the genetic and environmental contributions to birth weight variability.

Main Methods:

  • Utilized a family study design with father-mother-firstborn child trios.
  • Analyzed data from the complete Norwegian birth population (1967-1998).

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  • Included 67,795 families in the study.

    • Main Results:

    • Mother-child and father-child birth weight correlations were 0.226 and 0.126, respectively.
    • The relative risk of low birth weight was 8.2 when both parents had low birth weight.
    • Estimated heritability for birth weight was approximately 0.25, assuming no paternal cultural transmission effects.

    Conclusions:

    • Paternal birth weight is a significant, independent predictor of offspring low birth weight.
    • The estimated heritability of birth weight is lower than prior single-generation estimates in Norway.
    • Findings highlight the importance of considering paternal factors in birth weight research.