Skip to main content
    • Aa
    • Aa
  • Get access
    Check if you have access via personal or institutional login
  • Cited by 20
  • Cited by
    This article has been cited by the following publications. This list is generated based on data provided by CrossRef.

    Derraik, José G B Ahlsson, Fredrik Lundgren, Maria Jonsson, Björn and Cutfield, Wayne S 2016. First-borns have greater BMI and are more likely to be overweight or obese: a study of sibling pairs among 26 812 Swedish women: Table 1. Journal of Epidemiology and Community Health, Vol. 70, Issue. 1, p. 78.

    Puskarczyk, Karolina Galbarczyk, Andrzej Klimek, Magdalena Nenko, Ilona Odrzywołek, Ludwik and Jasienska, Grazyna 2015. Being born after your brother is not a disadvantage: Reproductive success does not depend on the sex of the preceding sibling. American Journal of Human Biology, Vol. 27, Issue. 5, p. 731.

    VanderLaan, Doug P. Leef, Jonathan H. Wood, Hayley Hughes, S. Kathleen and Zucker, Kenneth J. 2015. Autism Spectrum Disorder Risk Factors and Autistic Traits in Gender Dysphoric Children. Journal of Autism and Developmental Disorders, Vol. 45, Issue. 6, p. 1742.

    Jelenkovic, Aline Silventoinen, Karri Tynelius, Per Helle, Samuli and Rasmussen, Finn 2014. Sex of preceding sibling and anthropometrics of subsequent offspring at birth and in young adulthood: A population-based study in Sweden. American Journal of Physical Anthropology, Vol. 154, Issue. 4, p. 471.

    Ayyavoo, Ahila Derraik, José GB Hofman, Paul L and Cutfield, Wayne S 2013. Is being first-born another risk factor for metabolic and cardiovascular diseases?. Future Cardiology, Vol. 9, Issue. 4, p. 447.

    Christiansen, Ole Bjarne Steffensen, Rudi and Nielsen, Henriette Svarre 2011. Anti-HY Responses in Pregnancy Disorders. American Journal of Reproductive Immunology, Vol. 66, p. 93.

    Luke, Nancy and Xu, Hongwei 2011. Exploring the meaning of context for health: Community influences on child health in South India. Demographic Research, Vol. 24, p. 345.

    Milne, F. H. and Judge, D. S. 2011. Brothers delay menarche and the onset of sexual activity in their sisters. Proceedings of the Royal Society B: Biological Sciences, Vol. 278, Issue. 1704, p. 417.

    Bogaert, Anthony F. 2010. Physical Development and Sexual Orientation in Men and Women: An Analysis of NATSAL-2000. Archives of Sexual Behavior, Vol. 39, Issue. 1, p. 110.

    Nielsen, Henriette Svarre Mortensen, Laust H. Nygaard, Ulrikka Schnor, Ole Christiansen, Ole Bjarne and Andersen, Anne-Marie N. 2010. Sex of Prior Children and Risk of Stillbirth in Subsequent Pregnancies. Epidemiology, Vol. 21, Issue. 1, p. 114.

    Schwartz, Gene Kim, Rachael M. Kolundzija, Alana B. Rieger, Gerulf and Sanders, Alan R. 2010. Biodemographic and Physical Correlates of Sexual Orientation in Men. Archives of Sexual Behavior, Vol. 39, Issue. 1, p. 93.

    Vernier, Michel C. Mackenzie, C.J.G. Schulzer, Michael and Vernier, Pierre R. 2010. Influence of the mother's preceding pregnancies on fetal development and postnatal survival of the neonate, in normal pregnancy. An immunological phenomenon?. American Journal of Human Biology, Vol. 22, Issue. 5, p. 708.

    Jasienska, Grazyna 2009. Reproduction and lifespan: Trade-offs, overall energy budgets, intergenerational costs, and costs neglected by research. American Journal of Human Biology, Vol. 21, Issue. 4, p. 524.

    Rickard, Ian J. Lummaa, Virpi and Russell, Andrew F. 2009. Elder brothers affect the life history of younger siblings in preindustrial humans: social consequence or biological cost?. Evolution and Human Behavior, Vol. 30, Issue. 1, p. 49.

    Hall, Patricia A. and Schaeff, Catherine M. 2008. Sexual Orientation and Fluctuating Asymmetry in Men and Women. Archives of Sexual Behavior, Vol. 37, Issue. 1, p. 158.

    Rickard, Ian J. 2008. Offspring are lighter at birth and smaller in adulthood when born after a brother versus a sister in humans. Evolution and Human Behavior, Vol. 29, Issue. 3, p. 196.

    Rickard, I. J Russell, A. F and Lummaa, V. 2007. Producing sons reduces lifetime reproductive success of subsequent offspring in pre-industrial Finns. Proceedings of the Royal Society B: Biological Sciences, Vol. 274, Issue. 1628, p. 2981.

    Bernsen, R. M. D. van der Wouden, J. C. Nagelkerke, N. J. D. and de Jongste, J. C. 2006. Early life circumstances and atopic disorders in childhood. Clinical <html_ent glyph="@amp;" ascii="&amp;"/> Experimental Allergy, Vol. 36, Issue. 7, p. 858.

    Blanchard, Ray Cantor, James M. Bogaert, Anthony F. Breedlove, S. Marc and Ellis, Lee 2006. Interaction of fraternal birth order and handedness in the development of male homosexuality. Hormones and Behavior, Vol. 49, Issue. 3, p. 405.

    Blanchard, Ray 2004. Quantitative and theoretical analyses of the relation between older brothers and homosexuality in men. Journal of Theoretical Biology, Vol. 230, Issue. 2, p. 173.



  • DOI:
  • Published online: 01 July 2003

The purpose of this study was to investigate whether the well-established relationship between parity and birth weight is affected by the sex composition of siblings, especially for male newborns. Subjects were 856 male and 862 female newborns who weighed at least 2500 g at birth, who were born after 37 completed weeks of gestation, who obtained an Apgar score of 7 or higher, who had the same biological parents as all other children in the sibship, and who lived in the same household. Information on birth weight was collected from hospital records. Results showed that male newborns with older brothers weighed less than male newborns with older sisters. In contrast, the weight of female newborns with older brothers did not differ from the weight of female newborns with older sisters. One explanation of these results is that maternal immunoreactivity to some male-specific feature of the fetus affects prenatal development and consequently reduces birth weight in males. The relation between older brothers and birth weight may have theoretical significance for behavioural variables.

Corresponding author
To whom all correspondence and reprint requests should be addressed, now at the Département des sciences de l’éducation et de psychologie, Université du Québec à Chicoutimi, 555 boulevard de l’Université, Chicoutimi, Québec, Canada, G7H 2B1.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Journal of Biosocial Science
  • ISSN: 0021-9320
  • EISSN: 1469-7599
  • URL: /core/journals/journal-of-biosocial-science
Please enter your name
Please enter a valid email address
Who would you like to send this to? *