In laboratory animals, exposure to gonadal steroid hormones before and immediately after birth can exert permanent effects on many behaviors, particularly reproductive behaviors. The extent to which such effects occur in humans remains an open question, but several lines of evidence indicate that perinatal levels of both androgens and estrogens may affect adult human psychology and behavior, including sexual orientation and gender nonconformity. Some putative indicators of prenatal androgen exposure, including the ratio of the length of the index finger to that of the ring finger (2D:4D), have repeatedly indicated that lesbians, on average, were exposed to more prenatal androgens than straight women, suggesting that sufficient fetal androgen exposure predisposes a fetus to gynephilia (attraction to women) at maturity. The digit ratios of gay men do not differ from those of straight men, suggesting that prenatal androgen levels are not responsible for their androphilia (attraction to men). However, evidence that gay men who prefer an insertive anal sex role (ASR) have more masculine digit ratios than those preferring a receptive ASR suggests that early androgens influence some sexual preferences in men. Furthermore, digit ratios among gay men have been found to correlate with recalled childhood gender nonconformity (CGN). People with isolated gonadotropin-releasing hormone (GnRH) deficiency (IGD) offer further insight into the effects of perinatal gonadal steroid exposure. In people with IGD, gonadal hormone production is low or absent after the first trimester of gestation. However, because placental gonadotropins drive gonadal hormone secretion during the first trimester when genitalia sexually differentiate, individuals with IGD are unambiguously male or female at birth, consistent with their chromosomal and gonadal sex. Men with IGD report greater CGN, again suggesting that perinatal androgen exposure contributes to male-typical behavioral patterns in humans. Interestingly, women with IGD report less androphilia and more bisexuality than control women, suggesting that perinatal ovarian steroids in females typically augment androphilia in adulthood. Taken together, these findings indicate that the perinatal hormonal milieu influences human sexual orientation and gender conformity.
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http://dx.doi.org/10.1101/cshperspect.a039123 | DOI Listing |
Alcohol Alcohol
November 2024
Department of Health Science, College of Health and Wellness, Johnson & Wales University, 8 Abbott Park Place, Providence, RI 02903, United States.
Aims: The study investigated relationships between how youth and young adults access alcohol and their binge drinking behaviors.
Methods: Data from the Rhode Island Student Survey (11- to 18-year-olds) and the Mobile Screen Time project (18- to 24-year-old) were included. Participants were asked whether they access alcohol through several different methods (e.
BMC Nurs
December 2024
Department of Nursing, University of New Hampshire, Hewitt Hall, 4 Library Way, Durham, NH, USA.
Background: While efforts to improve the educational preparedness of nurses to care for lesbian, gay, bisexual, transgender, and queer (LGBTQ +) people have increased, the influence of role-modeled behaviors by healthcare professionals working with nursing students and recent graduates is not well understood. The purpose of this study is to describe the role-modeled behaviors of healthcare professionals observed by nursing students and recent graduates caring for LGBTQ + patients in clinical settings.
Methods: A cross-sectional, online survey was conducted.
Acta Dermatovenerol Alp Pannonica Adriat
December 2024
Institute of Microbiology and Immunology, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia.
Shigellae can be transmitted through sexual contact, especially among gay, bisexual, and other men who have sex with men (gbMSM). The dynamics and factors contributing to sexual transmission of shigellosis are not yet fully understood. Shigella spp.
View Article and Find Full Text PDFWomens Health (Lond)
December 2024
School of Nursing, University of Michigan, Ann Arbor, MI, USA.
Background: Gender-based violence (GBV) is a global public health problem. While research exists on GBV and associated help-seeking behaviors among university students, few studies have assessed the prevalence of GBV, including experiences and barriers to help-seeking, within sub-Saharan African university settings.
Objectives: The objective of this study was to examine the prevalence of GBV victimization among university students in six sub-Saharan African countries and describe experiences of formal and informal help-seeking among students who self-identified as victims of GBV since attending university.
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