It’s a Boy! Evidence for Sex Ratio Adjustment in Humans

Navara, Kristen J.

doi:10.1007/978-3-319-71271-0_2

Choosing Sexes

2018

DOI: 10.1007/978-3-319-71271-0_2

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It’s a Boy! Evidence for Sex Ratio Adjustment in Humans

Kristen J. Navara

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2024

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Socioeconomic status and sex ratio in the contemporary Hungarian population

Sarkadi,

Szász,

Rosivall

2024

Evolut. Hum. Sci.

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According to the Trivers–Willard hypothesis (TWH), when the mother's condition around conception influences the future reproductive success of male and female offspring differently, the adjustment of offspring sex ratio (SR) to maternal condition will increase the parents’ fitness. The TWH has been tested in several taxa, including humans where socioeconomic status as an index of condition has been widely used. The results are inconsistent, possibly because the preconditions of the TWH are not always met. To investigate the preconditions and prediction of the TWH in the contemporary Hungarian population, we collected data by an online questionnaire on self-perceived childhood living standard, the number of children and the sex of the respondents’ siblings. We found no sex-specific relationship between reproductive success and childhood living standards, thus the precondition of the TWH was not met. We found no relationship between socioeconomic status and offspring SR when data from the whole country was used, but there was a tendency in the predicted direction when we used data from Budapest and considered the SR of only those family members who were born under similar conditions. Similar approaches should be preferred in the future to avoid noise caused by changing status during the reproductive lifespan.

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Socioeconomic status and sex ratio in the contemporary Hungarian population

Sarkadi,

Szász,

Rosivall

2024

Evolut. Hum. Sci.

View full text Add to dashboard Cite

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It’s a Boy! Evidence for Sex Ratio Adjustment in Humans

Cited by 1 publication

References 81 publications

Socioeconomic status and sex ratio in the contemporary Hungarian population

Socioeconomic status and sex ratio in the contemporary Hungarian population

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