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Sex Ratios in Large Sibships, in the Presence of Twins and in Jewish Sibships

Published online by Cambridge University Press:  31 July 2008

William H. James
William H. James
Affiliation:
The Gallon Laboratory, University College London
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Summary

It is argued that the author's hypothesis relating timing of insemination (and hence coital rate) to the sex ratio of the resulting children is supported by the available data on the variation of sex ratio with (1) sibship size, (2) the presence of twin sibs, and (3) parental adherence to the Jewish faith.

Type
Research Article
Information
Journal of Biosocial Science , Volume 7 , Issue 2 , April 1975 , pp. 165 - 169
Copyright
Copyright © Cambridge University Press 1975

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References

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