A rare case of overt and mutual homosexuality in female identical twins

Pardes, Herbert; Steinberg, Jorge; Simons, Richard C.

doi:10.1007/bf01567725

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1973

2000

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Cited by 7 publications

(1 citation statement)

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“…Two cases of overt homosexuality in monozygotic twins have been reported in the literature, but evidence of a genetic component in the development of female homosexuality has not yet been found (Pardes, Stinberg, & Simons, 1967;Perkins, 1973 abnormality.…”

mentioning

confidence: 99%

Homosexuality among women: historical and current views in psychology

Bracy¹

2000

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mentioning

confidence: 99%

Homosexuality among women: historical and current views in psychology

Bracy¹

2000

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Heritable Factors Influence Sexual Orientation in Women

Bailey

Pillard

Neale

et al. 1993

Arch Gen Psychiatry

259

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Homosexual female probands with monozygotic cotwins, dizygotic cotwins, or adoptive sisters were recruited using homophile publications. Sexual orientation of relatives was assessed either by asking relatives directly, or, when this was impossible, by asking the probands. Of the relatives whose sexual orientation could be confidently rated, 34 (48%) of 71 monozygotic cotwins, six (16%) of 37 dizygotic cotwins, and two (6%) of 35 adoptive sisters were homosexual. Probands also reported 10 (14%) nontwin biologic sisters to be homosexual, although those sisters were not contacted to confirm their orientations. Heritabilities were significant using a wide range of assumptions about both the base rate of homosexuality in the population and ascertainment bias. The likelihood that a monozygotic cotwin would also be homosexual was unrelated to measured characteristics of the proband such as self-reported history of childhood gender nonconformity. Concordant monozygotic twins reported similar levels of childhood gender nonconformity.

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Female Homosexuality—A Review

Kenyon¹

1974

Understanding Homosexuality: Its Biological and Psychological Bases

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A rare case of overt and mutual homosexuality in female identical twins

Cited by 7 publications

References 27 publications

Homosexuality among women: historical and current views in psychology

Homosexuality among women: historical and current views in psychology

Heritable Factors Influence Sexual Orientation in Women

Female Homosexuality—A Review

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