Fraternal Birth Order, Family Size, and Male Homosexuality: Meta-Analysis of Studies Spanning 25 Years

@article{Blanchard2018FraternalBO,
  title={Fraternal Birth Order, Family Size, and Male Homosexuality: Meta-Analysis of Studies Spanning 25 Years},
  author={R. Blanchard},
  journal={Archives of Sexual Behavior},
  year={2018},
  volume={47},
  pages={1-15}
}
  • R. Blanchard
  • Published 2018
  • Psychology, Medicine
  • Archives of Sexual Behavior
  • The fraternal birth order effect is the tendency for older brothers to increase the odds of homosexuality in later-born males. This study compared the strength of the effect in subjects from small versus large families and in homosexual subjects with masculine versus feminine gender identities. Meta-analyses were conducted on 30 homosexual and 30 heterosexual groups from 26 studies, totaling 7140 homosexual and 12,837 heterosexual males. The magnitude of the fraternal birth order effect was… CONTINUE READING
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