Behavioural and biological determinants of human sex ratio at birth.

@article{James2010BehaviouralAB,
  title={Behavioural and biological determinants of human sex ratio at birth.},
  author={William H. James},
  journal={Journal of biosocial science},
  year={2010},
  volume={42 5},
  pages={
          587-99
        }
}
The human sex ratio SR (proportion male) at birth has been reported to vary with many variables. The explanation of this variation is not established, but I have hypothesized that it is partially caused by the hormonal concentrations of both parents around the time of conception. The present note suggests how this hypothesis might accommodate recent sex ratio findings relating to 'psychosexual restriction', female genital cutting, sexes of prior sibs, finger length ratios, the autism spectrum… CONTINUE READING
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Socioeconomic status and sex ratios at birth in Sweden: No evidence for a Trivers-Willard effect for a wide range of status indicators.

  • American journal of human biology : the official journal of the Human Biology Council
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