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The first part of this chapter discusses issues of sex structure. It next considers sex as a demographic concept, and then considers the five biological definitions of sex. It next focuses on demographic indexes of sex composition, especially the sex ratio and the sex ratio at birth, followed by discussions of the importance of sex and the demographic processes. The section ends with a discussion of intersex. The second section of the chapter focuses on gender identity; first discussed are definitions and terminology dealing with gender identity, particularly transgender. It next examines various issues dealing with trans men and trans women, trans gender nonbinary persons, and cis men and cis women. Empirical research is next discussed comparing trans persons with cis persons. There are significant differences between the trans male and trans female populations compared to the cis male and cis female populations.
Psychotic experiences (PEs) in are associated with elevated risk for mental health difficulties. This study examined predictors of PEs, inclusive of the role of gender, ethnicity, and protective factors.
Methods
Data were drawn from a 2021 Planet Youth survey of adolescents (n = 4,005). PEs were measured using the adolescent psychotic symptom screener. Effects of psychosocial predictors on PEs were measured by fitting multivariable logistic regression main effect and joint exposure models.
Results
29.8% reported PEs. Black/Asian/Other minorities had elevated odds (aOR = 1.59, 95% CI 1.26–2.02, p < .001). Increased odds in males, females, undisclosed gender and non-binary/transgender with elevated emotional/behavioural difficulties (aOR = 4.47, 95% CI 3.53–5.67, p < .001; aOR = 3.25, 95% CI 2.59–4.08, p < .001; aOR = 4.83, 95% CI 2.58–9.02, p < .001; aOR = 4.33, 95% CI 2.69–6.97, p < .001 respectively). High odds in undisclosed gender with low emotional/behavioural difficulties (aOR = 4.36, 95% CI 1.50–12.66, p = .007). Lower odds from perceived school/home safety (aOR = 0.69, 95% CI 0.58–0.83, p < .001 and (aOR = 0.81, 95% CI 0.66–0.99, p = .038, respectively). Elevated odds from recent adversities (aOR = 1.91, 95% CI 1.47–2.49, p = .011) attenuated by parental support (aOR = 1.76, 95% CI 1.17–2.65, p < .001). Each additional adversity (>12 months) increased odds (aOR = 1.12, 95% CI 1.07–1.17, p < .001).
Conclusions
Findings highlight the interplay of risk and protective factors in adolescent PEs, with increased vulnerability among minoritized youth. Results support targeted interventions to reduce mental health disparities.
Biological differences between the sexes are perhaps at their most obvious when considering sporting competition. This chapter considers the law in relation to sporting competition from two distinct perspectives. The first looks at the case law of the European Court of Human Rights as it relates to the participation of athletes with DSDs in the female category. A central theme in this analysis is the importance of understanding the precise nature of a particular DSD before legal analysis can be conducted. The second part looks at the domestic law in relation to sporting competitions and takes the opportunity to examine the first case to apply the Supreme Court judgment in For Women Scotland v. The Scottish Ministers and provide detailed reasons. This is a convenient opportunity to restate the key implications of the case and to address, as the court did, some common arguments advanced to criticise or narrowly interpret the Supreme Court judgment.
This chapter provides a detailed analysis of the UK Suprme Court’s decision in For Women Scotland v The Scottish Ministers, the landmark case which considered the definition of sex in the Equality Act 2010. The Court set out a test for determining when a Gender Recognition Certificate will not modify an individual’s legally recognised sex. In so doing, the Court reiterated the default common law position that sex is binary, biological, and immutable as a matter of fact. The Gender Recognition Act will not modify an individual’s legally recognised sex where the terms, context, and purpose of another enactment show that sex was intended to mean biological sex, because of a clear incompatibility between a certificated reading of sex and another enactment or where an enactment’s provisions are rendered incoherent and unworkable by a certificated sex interpretation. Applying this test to the Equality Act 2010, the Court concluded that a biological meaning of sex prevails. In concluding as such, the Court maintained equality of status for those protected under the characteristic of gender reassignment and reiterated that transgender people remain protected from associative or perception-based sex discrimination. While doctrinally a modest clarification, the judgment has significant social impact, correcting widespread misinterpretations of sex and gender in law.
The introduction traces the history of legal discrimination against women in the UK, from exclusion in university education and voting rights to the legal profession. Courts presumed sex-based distinctions as default, requiring parliamentary intervention for reforms including women’s suffrage, equal pay, and the protection of women from sex discrimination and sexual harassment in the workplace. The Sex Discrimination Act 1975 prohibited discrimination while allowing exceptions for protection of women, including single-sex spaces. These legal developments operated on a tacit understanding of sex as biological sex, which can be distinguished from emerging concepts of gender as a system of social norms overlayed on biological sex and gender identity as an individuals internalised experience of these norms. The chapter then provides a descriptive overview of the Equality Act 2010 as a resource for readers unfamiliar with its structure and core principles.
This chapter traces the legal development of trans rights advocacy away from a medical model towards one based on gender identity. This shift resulted in an expansion of both terminology and concepts to encompass a broader cohort of individuals than previously envisaged. This eventially led to attempts by activists to reform the law towards a self-identification model. Both the Scottish and the UK government proposed gender recognition reform. After consultation, the UK government abandoned the project, concerned about the impact on women’s rights, but the Scottish government pressed ahead, ultimately leading to a legal dispute when the UK government used a power within devolution law to prevent the Scottish Gender Recognition Reform Bill from obtaiingn Royal Assent. This Chapter analyses the impact that self-identification of sex would have had on women’s sex-based equality rights and the resulting legal challenge brought to the lawfulness of the UK goverment blocking Scottish gender recognition reform.
This article introduces the new module Gender in Contemporary Europe: Rethinking Equality and the Backlash developed for Round 11 of the European Social Survey (ESS). The module represents the first large-scale, cross-national effort to comprehensively map contemporary gender attitudes using both established and innovative measures. It captures five interrelated contemporary concepts that have rarely been included in prior cross-national surveys available for public use: gender identity, sexism (hostile, benevolent, and modern), perceived and experienced gender discrimination, the salience of gender equality as a social value, and support for gender equality policies. Pretesting and cognitive interviews conducted across a group of participating countries highlighted both the value and the complexity of measuring gender-related constructs, particularly in relation to translation challenges, perceived item bias, and social desirability effects. As we introduce the new data set, we highlight four critical challenges for gender research: bias, gendered translation, response bias, and cross-national measures of sexism. We also provide details on how the module development tackled each of these.
Over the last century, UK law has moved from endorsing, and in some cases mandating, unjust sex discrimination to a robust framework of distinct protections for women and girls. At the same time, our law has extended anti-discrimination protections to people who undergo gender reassignment, culminating in a system where individuals can change their legally recognised sex for some purposes. Sometimes the interests of these two groups conflict, most notably where the law must differentiate based on biological sex in contexts where those with transgender identities wish to be classed by reference to gender identity instead. For a time, there was uncertainty over the precise interaction between these competing interests within equality law. In 2025 this was resolved in a landmark case brought by the feminist organisation For Women Scotland. This book traces the history of how sex changed within our law and what that means for ongoing controversies over single-sex spaces, freedom of belief, freedom of expression, privacy, sport, and sexual intimacy.
This article examines the construction of gendered collective identity among leftist women in Turkey through their post-1980 coup prison memory. By analyzing 124 autobiographical narratives, we uncover a process of identity formation grounded in a continuous negotiation between past struggles and present concerns, constituting a counternarrative that challenges the master narrative of defeat and submission prevalent after the coup. The article’s tripartite framework of distance, substance, and persistence underscores women’s journey from marginalization to collective empowerment, producing shifting subject positions across time. By placing temporality at the center of collective identity formation, this study contributes to feminist memory literature and identity studies while addressing a significant historiographical gap by bringing the neglected struggles of leftist women in Turkey to light.
Ameliorative approaches to gender propose ways of defining gender terms which are intended to be trans-inclusive. In this article, I discuss two such proposals and find them wanting. I suggest a new ameliorative definition which aims to improve on those already in the literature.
The English pronoun they is currently undergoing a rapid change, in that they is increasingly being used to refer to specific (named) individuals as a singular personal pronoun. Although it has been used with a singular, indefinite antecedent for centuries, singular specific they is relatively new and coincides with rising recognition of the fluidity of gender identity and expression. For many individuals, they/them pronouns fit their gender identity best. However, such individuals are at a high risk of being misgendered because this new usage of they is neither well established grammatically nor part of prescribed use. In two experiments, adults from across the United States created short written narratives about individuals of different gender presentations. We varied whether participants saw a pronoun in the stimuli and, if so, whether they saw they, he, or she. We found that singular specific they was used less than she/he and that they-usage increased for those who reported being more familiar with it and with the LGBTQ+ community more generally. We further found that images that appeared androgynous or nonbinary were more likely to elicit singular specific they than were images that appeared binary. Finally, we varied whether participants received brief information about the person that included singular specific they. This type of modeling led to dramatic increases in they-production overall, and increases were most robust for participants who reported higher familiarity. Overall, this research illustrates that characteristics tied to social experience, modeling, and visual cues to an individual's gender identity are highly informative for the production of singular specific they. More broadly, we illustrate that language-processing costs related to language production can be boosted for users and therefore can intervene in the likelihood of misgendering.
Children and young people are increasingly being referred to specialist gender services, and available data on their characteristics are limited. The Longitudinal Outcomes of Gender Identity in Children (LOGIC) study is the first independently funded UK research programme to comprehensively assess quality of life, autism, service use and the psychological well-being of children and adolescents referred to gender services.
Aims
The aim of this baseline assessment is to obtain a multidimensional profile of children and young people on the waiting list for the gender service.
Method
Data were obtained from 617 parents and caregivers and 565 children and young people, representing a quarter of those on the waiting list eligible to participate. Participants were assessed across a range of domains including gender identity, gender dysphoria, mental health and well-being, autism, physical health, service use and quality of life.
Results
Gender dysphoria rates among our sample were high, particularly among adolescents. Almost all participants had socially transitioned. Compared with children, adolescents reported significantly poorer quality of life, particularly in relation to self-perception and psychological well-being. Relative to reference population samples, our cohort demonstrated elevated levels of mental ill health and reduced quality of life, although the magnitude of these differences varied. In addition, 59% of young people aged 11 years or over reported self-harm in the past year. Over half of the cohort had received a psychiatric diagnosis, and co-occurrence rates were high. A third of the cohort was either diagnosed with autism or undergoing assessment for autism.
Conclusions
Self-perception and psychological well-being represent particularly impaired quality of life dimensions for adolescents on the waiting list for the UK’s gender service. Complementing existing knowledge, differences emerged between young people and children, reflecting that the onset of puberty is a critical factor in the well-being of this cohort.
In this chapter, we first look at a new approach in how sex and gender are conceptualized, with gender no longer being viewed as a binary category (male versus female), but as including other options, such as transgender and gender nonbinary. We then briefly examine sex and gender from an evolutionary perspective, specifically parental investment theory. This is followed by a look at the development of sexuality, an individual’s erotic thoughts and activities, and then examine the origin of sexual orientation. We then look briefly at some gender differences and how such differences can be explained. (Most gender differences have been discussed in the chapters in which the specific content is examined.) The final section looks at the development of gender identity, focusing mainly on the cognitive factors that affect how children come to see themselves as males and females, followed by an examination of gender identification in transgender children.
This article examines the historical evolution of gender concepts in modern Afghanistan, tracing its development from nation-state building in the late nineteenth century through the revolutionary influences of Socialist and Islamist movements, and into the transformations prompted by the U.S. invasion in 2001. While situating the topic within its broader historical framework, the analysis centers on two archetypal figures of iconoclastic women in twentieth-century Afghanistan: those affiliated with communist parties under the Democratic Republic of Afghanistan (DRA) and those associated with Islamist mujahidin groups. Drawing upon the traditional Afghan archetype of the heroic-poet woman, the discussion explores how warfare—both in theory and practice—reconfigured gender identities via a recurring cycle of uneven advancement and regressions. These shifts were driven largely by elite, top-down strategies that positioned urban women as symbolic agents enlisted to fight entrenched gender norms, rather than to transform them through meaningful reform. The article further addresses the roles of migration and regional ideologies in this process, underscoring how such dynamics often disregarded the lived experiences and needs of ordinary Afghan women. This oversight contributed to the rise of novel iterations of the poet-heroine archetype, which paradoxically sought to dismantle conventional notions of femininity. Ultimately, the article advocates for a viable feminist approach in Afghanistan grounded in local histories, geographies, and social realities—moving beyond rigid binary frameworks to achieve genuine relevance and effectiveness.
One of the most revolutionary human rights treaties, the Convention on the Elimination of All Forms of Discrimination Against Women (1979), was premised on the goal of achieving equality for sexes defined in a binary manner. In a far more recent history, as Sandra Duffy reconstructs in her chapter, gender identity and how to conceptualize and recognize the rights of transgender and other claimants have been high-profile points of controversy in international fora.
In 2018, Hannah Gadsby created a sensation through her stand-up show Nanette. In it she shocked audiences by telling her hard-hitting trauma narrative, revealing the impact of sexual abuse, male violence, and homophobia on her mental health. Controversially, Gadsby also claimed that stand-up as a form and the mainstream stand-up industry itself were significant agents in deepening her psychological harm. This chapter examines Gadsby’s dramaturgical strategies and struggles in attempting to construct a means of speaking about the pain of her lived experience and seeking a therapeutic means of addressing her trauma through stand-up. Luckhurst analyses Gadsby’s interest in ethical story-telling and her notion of educating audiences about laughter and political complicity. Finally, Luckhurst argues that Gadsby draws on therapy models to transform her trauma narrative into a story of healing for herself and her audiences.
Cross-gender behaviour gradually entered the spheres of aetiology and diagnosis during the eighteenth century with reference to scattered instances of male cross-dressing. But well into the nineteenth century, “gender identity” (a mid-twentieth-century term) remained a poorly theorised instance of medicalisation. Late eighteenth-century concepts of “dynamic hermaphroditism” accounted for gender-nonconforming behaviours and aspirations, but could not account for the observed heterogeneity in disparities between sexed body and mind. Increasingly substantive contributions to aetiology were seen during the late 1870s and 1880s, particularly in response to Carl Westphal’s convoluted, 1869 concept of “contrary sexual feeling” (conträre Sexualempfindung). Richard von Krafft-Ebing’s notion of metamorphosis sexualis paranoica provided one of the most authoritative approaches to the question of gender identification in “sexual inversion”. The notion, which took the first seven German editions of his Psychopathis sexualis to achieve a definitive formulation, needs to be seen in light of Krafft-Ebing’s earlier conceptions of sexual delusion, which straddled the realms of the experienced sexual body and sense of self. Moreover, Krafft-Ebing was not the first to outline a theory of non-cisgender identity, as demonstrated by the mid-1880s work of Théodule-Armand Ribot and Rudolph Arndt, as well as various significantly earlier approaches to what had been considered the “monomania of sexual transformation”.
Despite societal shifts in attitudes towards gender and sexuality, LGBTQ+ individuals continue to experience multiple forms of labour-market disadvantage – including greater unemployment, lower job satisfaction, and slower career progression. However, existing scholarship has paid little attention to the comparative employment conditions of LGBTQ+ and non-LGBTQ+ individuals. Leveraging unique data from a large, Australian, employer-employee dataset (2024 AWEI Employee Survey), we fill this knowledge gap by examining the relationships between LGBTQ+ status, non-standard employment (NSE), and workplace well-being. Consistent with our theoretical expectations, we provide novel empirical evidence of the ‘double whammy’ faced by LGBTQ+ employees in relation to NSE. On the one hand, LGBTQ+ employees are more likely to be in certain forms of NSE than non-LGBTQ+ employees; on the other, their workplace well-being is more negatively impacted by these employment arrangements. These findings bear important lessons for policy and practice, indicating that closing the gap between LGBTQ+ and non-LGBTQ+ workers requires careful consideration of their employment arrangements and the circumstances that surround them.
This article examines Bianca Lovado’s human rights complaints as the first trans woman transferred from a men’s to a women’s remand facility in British Columbia, Canada. Despite the initial transfer, upon re-arrest, Ms. Lovado was inconsistently placed in men’s and women’s facilities and was denied gender-affirming care between 2015 and 2019. Drawing on theories of biopolitical and queer/trans necropolitical governance, I conduct a thematic analysis of her five complaints against BC Corrections. The paper investigates how, despite human rights legislation protecting gender identity and expression, cisnormative sex-based correctional logics regulate trans prisoners. Building on Foucault’s institutions of power, I identify how cisnormative techniques of power led Ms. Lovado to face necropolitical violence via incorrect prison placement and denial of gender-affirming care. Analyzing how Ms. Lovado uses the tribunal to combat necropolitical violence, this paper illustrates the consequences of sex as an institution of power governing over gender, despite equal protections in Canadian law.
Most twin registries have not systematically collected the data required to determine gender identity, which has limited opportunities to evaluate potential familial contributors to gender diversity. This study addresses this gap by analyzing responses to gender identity questions introduced in Twins Research Australia’s 2023 survey. Among 4475 respondents (mean age 52.2 years, SD = 15.3), 36 (0.8%) indicated a transgender or gender diverse identity, which is consistent with population-based estimates of gender diversity internationally. Gender diversity co-occurred in 2/19 monozygotic pairs and 0/8 dizygotic pairs, giving rise to tetrachoric correlations of 0.62 (95% CI [0.33, 0.87]) and 0.00 (95% CI [0.00, 0.88]), respectively. These results broadly align with previous concordance estimates from twin studies that were specifically focused on gender identity. Although limited by a small sample size, these findings demonstrate the feasibility and utility of systematically collecting gender identity data through routine twin registry surveys.