Literature DB >> 6660920

A study of the sex ratio of first-born according to the mother's month of birth.

T Miura, K Nonaka, M Shimura, I Nakamura.   

Abstract

The male-to-female sex ratio at birth of the first-born babies delivered in Japan to mothers aged 25 years or less was investigated in two groups: a hospital group and a questionnaire group. The sex ratio fluctuated according to their mother's month of birth. Between 1924 and 1928, the sex ratio of the offspring of the mothers born in March-May in both groups was significantly higher than that of the other mothers. We speculate about the relationship between the sex ratio at birth and the mother's month of birth.

Mesh：

Year:  1983        PMID： 6660920     DOI： 10.1007/bf02133800

Source DB:  PubMed          Journal:  Arch Gynecol        ISSN： 0170-9925


  20 in total

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6.  Paternal age and the secondary sex ratio in humans.

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  4 in total

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Journal:  Arch Gynecol       Date:  1987

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4.  Season of birth and dopamine receptor gene associations with impulsivity, sensation seeking and reproductive behaviors.

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  4 in total

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