Transgender Associations and Possible Etiology: A Literature Review

Endocrine-disrupting effects of bisphenol-A, thiamethoxam, and fipronil in hormone-naïve transmen compared to cis-women

BACKGROUND

Current evidence suggests that the etiology of gender dysphoria (GD) is multifactorial: this, however, remains unclear. Endocrine-disrupting chemicals (EDCs) are one of the etiological hypotheses.

OBJECTIVES

In this study, we aimed to evaluate the urinary levels of bisphenol A (BPA), thiamethoxam, and fipronil in hormone-naïve transmen compared with case-matched cis-women as well as the relation between sex hormone levels and EDCs.

METHODS

Drug-naïve transmen diagnosed with GD and who were referred from the psychiatry outpatient clinic to the outpatient clinic of the Department of Endocrinology, Marmara University Hospital, were included in the study. These individuals were assessed for eligibility; 38 drug-naïve transmen and 22 cis-women were recruited as the control group. After anthropometric evaluation laboratory tests for FSH, LH, total testosterone, and estradiol were carried out, spot urine samples were collected to evaluate the urine metabolic excretion of BPA, thiamethoxam, and fipronil.

RESULTS

We found that androgens, total testosterone, androstenedione, and DHEAS levels were significantly higher in transmen than in cis-women. Thiamethoxam was considerably higher in cis-women than in transmen, whereas fipronil and BPA levels were similar in both groups. A negative correlation was found between thiamethoxam and testosterone and between thiamethoxam and BPA levels.

CONCLUSION

The available data suggest that the EDCs that we are most exposed to in our lives are not the only factor in GD development. Even transmen who have not taken hormone replacement have high testosterone levels; however, the mechanism has not as yet been elucidated. The challenge is to determine whether this is a factor leading to GD or a condition that develops in common with GD.

Detransition Narratives Trouble the Simple Attribution of Madness in Transantagonistic Contexts: A Qualitative Analysis of 16 Canadians' Experiences

Emerging evidence suggests that transgender individuals are more likely than cisgender peers to receive a diagnosis with a primary mental disorder. Attributions of madness, though, may serve the social function of dismissing and discrediting transgender individual's self-perceptions. The narratives of individuals who stop or reverse an initial gender transition who also identify as living with mental health conditions can sometimes amplify these socio-political discourses about transgender people. Through a critical mental health lens, this article presents a qualitative analysis of 16 individuals who stopped or reversed a gender transition and who also reported a primary mental health condition. Semi-structured, virtual interviews were conducted with people living in Canada. Applying constructivist grounded theory methodology, and following an iterative, inductive approach to analysis, we used the constant comparative method to analyse these 16 in-depth interviews. Results show rich complexity such that participants narrated madness in nuanced and complex ways while disrupting biased attitudes that madness discredited their thoughts and feelings, including prior gender dysphoria. Instead, participants incorporated madness into expanding self-awareness and narrated their thoughts and feelings as valid and worthy. Future research must consider provider's perspectives, though, in treating mad individuals who detransitioned, since alternate gender-affirming care models may better support the identification and wellness of care-seeking individuals who may be identified (in the past, present, or future) as mad.

Prevalence and Comorbidity of Gender Dysphoria in Taiwan, 2010-2019

Gender dysphoria (GD) is a condition in which a person exhibits marked incongruence between their expressed or experienced gender and their sex assigned at birth. The last survey of individuals with GD in Taiwan was conducted approximately 10 years ago. In this study, we investigated the prevalence of GD in Taiwan within the last 10 years as well as comorbidities. A retrospective medical record review was performed for all patients in the database of the Health and Welfare Data Science Center covered by National Health Insurance in Taiwan from January 2010 until December 2019. The study population of persons with GD was defined as individuals who had been diagnosed with transsexualism (transgender or transsexual) or gender identity disorders. Our review found case numbers and prevalence of GD in 2019 were about twice that of patients in 2010 for both assigned males and assigned females at birth. Case numbers for 2010 versus 2019 were 440 versus 867 for assigned males at birth, and 189 versus 386 for assigned females at birth. The 1-year prevalence for 2010 versus 2019 was 3.8/100,000 versus 7.4/100,000 for assigned males at birth, and 1.6/100,000 versus 3.2/100,000 for assigned females at birth. Comorbidities of attention-deficit/hyperactivity disorder (ADHD), autism spectrum disorder (ASD), and psychosis were more likely in children with GD younger than 12 years of age; comorbid depression was more likely in adolescents and adults with GD. Improvements in social and mental health support should be provided to help address these comorbidities of ADHD, ASD, and depression among individuals with GD.

An expanded set of genome-wide association studies of brain imaging phenotypes in UK Biobank

UK Biobank is a major prospective epidemiological study, including multimodal brain imaging, genetics and ongoing health outcomes. Previously, we published genome-wide associations of 3,144 brain imaging-derived phenotypes, with a discovery sample of 8,428 individuals. Here we present a new open resource of genome-wide association study summary statistics, using the 2020 data release, almost tripling the discovery sample size. We now include the X chromosome and new classes of imaging-derived phenotypes (subcortical volumes and tissue contrast). Previously, we found 148 replicated clusters of associations between genetic variants and imaging phenotypes; in this study, we found 692, including 12 on the X chromosome. We describe some of the newly found associations, focusing on the X chromosome and autosomal associations involving the new classes of imaging-derived phenotypes. Our novel associations implicate, for example, pathways involved in the rare X-linked STAR (syndactyly, telecanthus and anogenital and renal malformations) syndrome, Alzheimer's disease and mitochondrial disorders.

Deficiencies in Scientific Evidence for Medical Management of Gender Dysphoria

Individuals who experience a gender identity that is discordant with biological sex are increasingly presenting to physicians for assistance in alleviating associated psychological distress. In contrast to prior efforts to identify and primarily address underlying psychiatric contributors to gender dysphoria, interventions that include uncritical social affirmation, use of gonadotropin-releasing hormone agonists to suppress normally timed puberty, and administration of cross-sex steroid hormones to induce desired secondary sex characteristics are now advocated by an emerging cohort of transgender medicine specialists. For patients with persistent gender dysphoria, surgery is offered to alter the appearance of breasts and genital organs. Efforts to address ethical concerns regarding this contentious treatment paradigm are dependent upon reliable evidence on immediate and long-term risks and benefits. Although strong recommendations have been made for invasive and potentially irreversible interventions, high-quality scientific data on the effects of this approach are generally lacking. Limitations of the existing transgender literature include general lack of randomized prospective trial design, small sample size, recruitment bias, short study duration, high subject dropout rates, and reliance on "expert" opinion. Existing data reveal significant intervention-associated morbidity and raise serious concern that the primary goal of suicide prevention is not achieved. In addition to substantial moral questions, adherence to established principles of evidence-based medicine necessitates a high degree of caution in accepting gender-affirming medical interventions as a preferred treatment approach. Continued consideration and rigorous investigation of alternate approaches to alleviating suffering in people with gender dysphoria are warranted.

SUMMARY

This paper provides an overview of what is currently known about people who experience a gender identity that differs from their biological sex and the associated desire to engage the medical profession in alleviating associated discomfort and distress. The scientific evidence used to support current recommendations for affirming one's preferred gender, halting normally timed puberty, administering cross-sex hormones, and surgically altering primary and secondary sexual traits are summarized and critically evaluated. Serious deficits in understanding the cause of this condition, the reasons for the marked increase in people presenting for medical care, together with immediate and long-term risks relative to benefit of medical intervention are exposed.

Is Research on Transgender Children What It Seems? Comments on Recent Research on Transgender Children with High Levels of Parental Support

Recent research on transgender children who have had support from their parents for their transitioning has concluded that their mental health is virtually no different than that of nontransgender children. Such research has been extensively cited, over 370 times in the past three years. Most of the hundreds of reviews received the stated results of the studies with little caution. However, the research featured numerous statistical errors and omissions, the implications of which would likely lead neutral observers to conclude that the mental health of transgender children, even when supported by their parents, was poorer than that of the groups of control children. In particular, levels of anxiety as reported by both parents and their transgender children appear to be significantly higher, and the transgender children's reports of self-worth appear to be significantly lower. Although reports regarding depression are not as significantly different, the effect sizes were generally in a similar direction as the other outcomes, being less favorable for the transgender children. Such issues highlight the need for careful examination of statistical research, even when published in highly regarded medical journals. As with other research, findings from the early stages of controversial research may often be premature. Further research is needed to explore factors underlying these results.

Summary

Some scholars have believed that if transgender children were supported by their parents before the children reached puberty, the generally higher rates of mental illness experienced by many transgender persons might be prevented or alleviated. Dr. Kristina Olson of the Department of Psychology at the University of Seattle was the first scholar to have studied groups of transgender children who were being supported by their parents and to have compared them to a control group of children and to siblings of the same transgender children. Her conclusion was that there were minimal, if any, differences in anxiety, depression, and self-worth among the groups of children; her research has since been cited extensively as having found just that. We reanalyzed her raw data and found that, to the contrary, the transgender children, even when supported by their parents, had significantly lower average scores on anxiety and self-worth. Often, a significantly higher percentage of transgender children, compared to controls, featured preclinical or clinical levels of anxiety. Parental support of transgender children may temporarily reduce levels of poor mental health for some transgender children, but it does not appear to eliminate those problems for all transgender children. Our findings should serve as a warning against accepting research at a surface level, which can lead to acceptance of invalid information and pursuit of ineffective interventions.