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Updated: May 13, 2025

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Capturing Gender Diversity in Twin Research.

Will Conabere1,2, Anja Ravine1,2, Louise Bourchier3

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PubMed
Summary
This summary is machine-generated.

Most twin registries lack gender identity data. This study found 0.8% of respondents identified as transgender or gender diverse, suggesting familial factors may influence gender diversity.

Keywords:
Gender diversityGender identityTransgenderTwin registriesTwin research

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Area of Science:

  • Genetics
  • Psychology
  • Sociology

Background:

  • Limited systematic data collection on gender identity in twin registries hinders research into familial influences.
  • Previous studies on gender identity in twins have faced challenges due to data limitations.

Purpose of the Study:

  • To assess the feasibility and utility of collecting gender identity data within a large twin registry.
  • To estimate the prevalence of transgender and gender diverse identities in a twin cohort.
  • To explore potential familial contributions to gender diversity using twin data.

Main Methods:

  • Analysis of responses to gender identity questions from Twins Research Australia's 2023 survey.
  • Inclusion of 4475 adult respondents (mean age 52.2 years).
  • Calculation of tetrachoric correlations for gender diversity concordance in monozygotic and dizygotic twin pairs.

Main Results:

  • 0.8% (36 out of 4475) of respondents identified as transgender or gender diverse.
  • Prevalence aligns with international population-based estimates.
  • Tetrachoric correlations suggested potential familial influences (0.62 for MZ, 0.00 for DZ pairs), though limited by small sample size.

Conclusions:

  • Systematically collecting gender identity data in twin registries is feasible and valuable.
  • Findings support the utility of twin registries for studying the etiology of gender diversity.
  • Further research with larger sample sizes is warranted to confirm familial contributions.