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

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...

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Publicado en:Archives of Sexual Behavior Vol. 47; no. 1; pp. 1 - 16
Autor principal: Blanchard, Ray
Formato: journal article
Publicado: Springer Nature Jan2018
Materias:
Birth order
Family size
Male homosexuality
Sexual orientation
Siblings
Gender identity
Heterosexuals
Transgender people
Human sexuality
Families
Homosexuality
Research
Research evaluation
Meta-analysis
Research methodology
Evaluation research
Medical cooperation
Comparative studies
Immunity
Odds ratio
Probability theory
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