Critics claim trans people 'defy biology.' New research suggests otherwise

Research involving twin pairs with at least one transgender individual reveals intriguing insights into the origins of gender identity. Among the 463 twin pairs analyzed, the likelihood of being transgender was 21.2% among identical twins, compared to 8.7% among nonidentical twins. This significant difference underscores the role of genetics in shaping gender identity.

While environmental factors undoubtedly influence human traits, including gender identity, the study found that identical twins sharing both genes were more likely to share a transgender identity than nonidentical twins who share only 50% of their genes. This stepwise increase in concordance with genetic similarity provides strong evidence that genetic factors significantly contribute to the development of gender diversity.

It is essential to recognize that gender identity is not a choice or a social construct; rather, it is a complex interplay between genetic predispositions and environmental influences. The findings from this study challenge the notion that transgender identities are entirely due to social factors and should be dismissed as optional or reversible.

By confirming the role of genes in shaping gender identity, the research provides a crucial correction to harmful public discourse that seeks to deny the legitimacy of transgender individuals and their rights.