Transsexuality Among Twins: Identity Concordance, Transition, Rearing, and Orientation

@article{Diamond2013TranssexualityAT,
  title={Transsexuality Among Twins: Identity Concordance, Transition, Rearing, and Orientation},
  author={M. Diamond},
  journal={International Journal of Transgenderism},
  year={2013},
  volume={14},
  pages={24 - 38}
}
  • M. Diamond
  • Published 2013
  • Psychology
  • International Journal of Transgenderism
ABSTRACT The relative contributions of genetic and environmental factors to the development of gender identity have been debated. Twins were studied that are concordant or discordant for gender identity status in order to provide clarification of this issue. An extensive library search yielded reports of 27 male and 16 female sets concordant or discordant for transsexuality. An Internet bulletin board search and clinical contact requests for participants in a survey of twins in which one or… Expand
Gender Dysphoria and Transgender Identity Is Associated with Physiological and Psychological Masculinization: a Theoretical Integration of Findings, Supported by Systematic Reviews
Introduction Gender dysphoria (GD) is associated with several psychiatric conditions, but the causal links are not known. We note that some of these conditions are associated with physiologicalExpand
Sexuality education including lesbian, gay, bisexual, and transgender (LGBT) issues in schools
Abstract Should children and adolescents be educated in school about gender diversity, including lesbian, gay, bisexual and transgender (LGBT) issues? This is a question many governments andExpand
Biology of Gender Identity and Gender Incongruence
TLDR
Gender identity variance has been associated with distinct morphological characteristics of specific neuroanatomical structures, supporting the hypothesis that gender identity evolves as a consequence of the interaction of the developing brain and sex hormones. Expand
Familial Patterning and Prevalence of Male Androphilia in Samoa
TLDR
The present study replicated the familial nature of male androphilia in Samoa using a sample size that was ~122% larger than the one employed and found significantly more fa’afafine relatives in their maternal and paternal lines compared to Samoan gynephilic males. Expand
Etiology of Gender Dysphoria
Several theories of the etiology of gender incongruity have been proposed to explain the origins of the condition. Historically, individuals who were uncomfortable in their birth-assigned sex wereExpand
Biological Complexities, Myths, and Realities
Twins present many biological complexities and myths, but few people know the realities. A wide range of topics is covered in this chapter. They include the third type of twin (polar body twinning),Expand
Genetic Link Between Gender Dysphoria and Sex Hormone Signaling
TLDR
Gender dysphoria may have an oligogenic component, with several genes involved in sex hormone-signaling contributing, and overrepresented alleles and genotypes are proposed to undermasculinize/feminize. Expand
Transgender people: health at the margins of society
TLDR
The social and legal conditions in which many transgender people live, and the medical perspectives that frame the provision of health care for transgender people across much of the world are examined. Expand
Transthesia: Comparing the Prevalence of Synesthesia in Transgender and Cisgender Individuals
TLDR
A correlation between synesthesia and transgender identity that may indicate a common biological cause is suggested that may justify further research. Expand
Gender dysphoria in children.
Gender dysphoria (GD) of childhood describes a psychological condition in which children experience a marked incongruence between their experienced gender and the gender associated with theirExpand
...
1
2
3
...

References

SHOWING 1-10 OF 109 REFERENCES
Two Monozygotic Twin Pairs Discordant for Female-to-Male Transsexualism
  • N. Segal
  • Psychology, Medicine
  • Archives of sexual behavior
  • 2006
TLDR
In both pairs, the twins' gender identity differences emerged early, consistent with, but not proof of, co-twin differences in prenatal hormonal influences. Expand
Homosexual orientation in twins: A report on 61 pairs and three triplet sets
TLDR
Twin pairs in which at least one twin is homosexual were solicited through announcements in the gay press and personal referrals from 1980 to the present and findings are interpreted as supporting the argument for a biological basis in sexual orientation. Expand
Genetic and environmental influences on sexual orientation and its correlates in an Australian twin sample.
TLDR
Assessment of sexual orientation and 2 related traits: childhood gender nonconformity and continuous gender identity suggested that the causal architecture differed between men and women, and provided significant evidence for the importance of genetic factors to the traits' covariation. Expand
Familiality of Gender Identity Disorder in Non-Twin Siblings
TLDR
The study suggests that siblings of transsexuals may have a higher risk of being transsexual than the general population, and that the risk is higher for brothers than sisters of transsexualS, and for siblings of MF than FM transsexuals. Expand
Gender identity disorder and anorexia nervosa in male monozygotic twins.
TLDR
GID in childhood could be at least partly hereditary, whereas the development of the later phenotype of the gender identification is more determined by environmental factors, and GID might be a risk factor for the developed anorexia nervosa. Expand
Transsexualism ("gender identity disorder") - a CNS-limited form of intersexuality?
  • H. Meyer-Bahlburg
  • Psychology, Medicine
  • Advances in experimental medicine and biology
  • 2011
TLDR
The emerging data are interesting, but at this time insufficient to constitute a firm basis for the recategorization of GID as a form of CNS-limited intersexuality. Expand
Two monozygotic (identical) twin pairs discordant for gender identity
TLDR
Differential childhood experiences are described for the cotwins, which highlight environmental influences, which may contribute to variances in masculinity and femininity, when genetic influences are held relatively constant. Expand
Biological and psychosocial correlates of adult gender-variant identities: A review.
This article reviews research on biological and psychosocial factors relevant to the etiology of gender-variant identities. There is evidence for a genetic component of gender-variant identitiesExpand
Transsexualism in Serbia: a twenty-year follow-up study.
TLDR
Although transsexualism is a universal phenomenon, the relatively young age of those applying for sex reassignment and the sex ratio of 1:1 distinguish the population in Serbia from others reported in the literature. Expand
Gender identity disorder in twins: a review of the case report literature.
TLDR
A role for genetic factors in the development of gender identity disorder is suggested by a systematic review of case studies of twins concordant or discordant for GID. Expand
...
1
2
3
4
5
...