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Purpose of Review Working memory (WM) is a key process that is integral to many complex cognitive tasks, and it declines significantly with advancing age. This review will survey recent evidence supporting the idea that the functioning of the WM system in women is modulated by circulating estrogens. Recent Findings In postmenopausal women, increased estrogen concentrations may be associated with improved WM function, which is evident on WM tasks that have a high cognitive load or significant manipulation demands. Experimental studies in rhesus monkeys and human neuroimaging studies support a prefrontal locus for these effects. Defining the basic neurochemical or cellular mechanisms that underlie the ability of estrogens to regulate WM is a topic of current research in both human and animal investigations. Summary An emerging body of work suggests that frontal executive elements of the WM system are influenced by the circulating estrogen concentrations currently available to the CNS and that the effects are region-specific within the frontal cortex. These findings have implications for women’s brain health and cognitive aging.

Purpose of Review Sex differences in PTSD are well-established with a 2:1 sex ratio favouring women. Less well-established is the basis of such differences. The purpose of this review is to explore recent research examining potential gender- and sex-based contributors to sex differences in PTSD. Recent Findings We identified 19 studies published since 2015. Masculinity is inconclusively associated with PTSD, but masculine ideals and masculine gender role stress are positively associated with PTSD. Among the sex-related factors, testosterone, oestradiol, progesterone, and ALLO/5α-progesterone ratio are believed to be involved in the development of PTSD. These factors likely affect PTSD risk directly and through epigenetic mechanisms. Summary Findings suggest that gender and sex have multiple ways of affecting PTSD, including gender roles, genetic predisposition, and hormonal influences. These factors work together to put women at a particular risk of developing PTSD. By conducting more research, we may improve prediction, prevention, and treatment of PTSD.

Purpose of Review Insomnia is approximately 1.5 times more common in women than in men. To date, research has advanced our knowledge about why women report significantly more sleep problems than men despite not being reflected in objective sleep measures. Precisely understanding the symptomatology and pathological mechanisms underlying sex differences is important for prevention and providing appropriate interventions. Recent Findings Sex differences found in insomnia goes beyond simple explanations and have been proven to be a complicated interplay of biological, psychological, and social factors that play different roles throughout the life span. Summary This paper will review sex differences in insomnia based on risk factors, mechanisms, and consequences, as well as treatment response. In addition, we will also discuss treatment recommendations when working with female populations at different stages in the life span that may be more vulnerable to insomnia. Future studies utilizing prospective, longitudinal designs are needed to understand the interactions of various factors that can explain existing sex differences in insomnia.

Purpose of Review This scoping review includes recent literature on eating disorder diagnoses and evaluation of eating disorder symptom presentation among transgender youth (ages 8–25). Recent Findings A total of 20 publications from the previous 5 years were identified, including case reports, retrospective chart reviews, and surveys. Significantly higher rates of eating disorder symptoms were documented in transgender youth compared to cisgender youth. Similarly, some studies reported transgender youth were more likely to be diagnosed with an eating disorder than cisgender youth, though the proportion of youth with eating disorder diagnoses varied across studies. A consistent theme across case studies was engagement in food restriction and/or compensatory eating behaviors to prevent puberty onset or progression, suggesting that for some transgender youth, these behaviors may be understood as a means of coping with gender-related distress. Summary Clinical care could be enhanced through establishment of best practices for screening in settings offering eating disorder treatment and gender-affirming care, as well as greater collaboration among these programs. Research is needed to validate eating disorder measures for use with transgender youth and evaluate the effects of eating disorder treatment and gender-affirming medical interventions on the well-being of transgender youth.

Purpose of Review To evaluate the degree to which recent studies provide evidence that the effects of prenatal maternal stress (PNMS) on child health outcomes vary depending on the child’s biological sex. In this review, we used a broad definition of stress, including negative life events, psychological stress, and established stress biomarkers. We identified 50 peer-reviewed articles (published January 2015–December 2017) meeting the inclusion criteria. Recent Findings Most articles ( k  = 35) found evidence of either sex-specific associations (significant in one sex but not the other) or significant PNMS x stress interactions for at least one child health outcome. Evidence for sex-dependent effects was strongest in the group of studies evaluating child neural/nervous system development and temperament as outcomes. Summary There is sufficient evidence of sex-dependent associations to recommend that researchers always consider the potential role of child sex in PNMS programming studies and report descriptive statistics for study outcomes stratified by child biological sex.

Purpose of Review With increasing numbers of transgender and gender non-binary individuals presenting for care, knowing how to elucidate the mental health and cognitive outcomes of gender-affirming hormone therapy (GAHT) is necessary. This article reviews the present literature covering GAHT effects on mood, behavioral health, and cognition in these individuals and offers research priorities to address knowledge gaps. Recent Findings Although there are some conflicting data, GAHT overwhelmingly seems to have positive psychological effects in both adolescents and adults. Research tends to support that GAHT reduces symptoms of anxiety and depression, lowers perceived and social distress, and improves quality of life and self-esteem in both male-to-female and female-to-male transgender individuals. Summary Clinically, prescribing GAHT can help with gender dysphoria-related mental distress. Thus, timely hormonal intervention represents a crucial tool for improving behavioral wellness in transgender individuals, though effects on cognitive processes fundamental for daily living are unknown. Future research should prioritize better understanding of how GAHT may affect executive functioning.

Purpose of Review To explore recent research evidence addressing men’s depression and suicide. Included are discussions of recent literature investigating male depression symptoms, and men’s depression and suicidality help-seeking and engagement with professional mental health care services. Recent Findings Specific externalizing symptoms of substance misuse, risk-taking, and poor impulse control among men indicate the need for gender-sensitized depression screening and risk assessments. The reticence of some men for seeking professional health care has drawn public awareness raising and de-stigmatizing efforts, while clinical guidelines for working with boys and men have been offered to better serve men seeking help for depression and/or suicidality. Summary There is a strengthening case for male depression comprising specific externalizing symptomology, and these findings, along with high male suicide rates (including men who are seemingly in care), indicate the need for tailored approaches to men’s depression and suicide prevention.

Purpose of Review The purpose of this article is to highlight how sex differences in the gut-brain axis may contribute to the discrepancies in incidence of neurodevelopmental, psychiatric, and neurodegenerative disorders between females and males. We focus on autism spectrum disorder, psychotic disorders, stress and anxiety disorders, depression, Alzheimer’s disease, and Parkinson’s disease and additionally discuss the comorbidity between inflammatory bowel disorder and mental health disorders. Recent Findings Human and animal studies show that sex may modify the relationship between the gut or immune system and brain and behavior. Sex also appears to modify the effect of microbial treatments such as probiotics and antibiotics on brain and behavior. Summary There is emerging evidence that assessing the role of sex in the gut-brain axis may help elucidate the etiology of and identify effective treatments for neurodevelopmental, psychiatric, and neurodegenerative disorders.

Purpose of Review Inflammation has emerged as an important biological process in the development of many age-related diseases that occur at different frequencies in men and women. The aim of this review was to examine the current evidence linking stress and sleep with inflammation with a focus on sex differences. Recent Findings Psychosocial stress that occurs either acutely or chronically is associated with elevated levels of systemic inflammation. While not as robust, insufficient sleep, particularly sleep disturbances, appears to be associated with higher levels of inflammatory activity as well. In several contexts, associations of stress and insufficient sleep with inflammation appear stronger in women than in men. However, this should be interpreted with caution as few studies test for sex differences. Summary Stress and poor sleep often predict elevations in systemic inflammation. While there is some evidence that these associations are stronger in women, findings are largely mixed and more systematic investigations of sex differences in future studies are warranted.

Purpose of Review Sex differences in cognitive function are well documented yet few studies had adequate numbers of women and men living with HIV (WLWH; MLWH) to identify sex differences in neurocognitive impairment (NCI) and the factors contributing to NCI. Here, we review evidence that WLWH may be at greater risk for NCI. Recent Findings We conducted a systematic review of recent studies of NCI in WLWH versus MLWH. A power analysis showed that few HIV studies have sufficient power to address male/female differences in NCI but studies with adequate power find evidence of greater NCI in WLWH, particularly in the domains of memory, speed of information processing, and motor function. Summary Sex is an important determinant of NCI in HIV, and may relate to male/female differences in cognitive reserve, comorbidities (mental health and substance use disorders), and biological factors (e.g., inflammation, hormonal, genetic).