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[Prenatal maternal mnemonic effects on the human neuro-psychic sex: a new proposition from fetus-maternal tolerance-rejection].

Revista medica de Chile - 1 Dec 2008

Valenzuela Carlos Y

Abstract excerpt

In approximately 15% of homosexual men, their phenotype is associated to the fraternal birth order. Older biological brothers induce in their mothers anti-male factors (antibodies) that interfere the brain maleness development of younger fetuses. This effect is seldom seen in non-right-handed men and is not seen in women. The influence of older siblings is seen in their sex ratio (SR). In contradiction with...

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PMID: 19350172
DOI: /S0034-98872008001200007

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ABO

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PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 7 Sept 2026. Manifest publication-graph-cohort-2026-09-08.1.

Source receipt: pubmed, retrieved 7 Sept 2026.

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