The second to fourth finger digit ratio (2D:4D ratio) is a sex-dimorphic characteristic in humans that may reflect relative levels of first trimester prenatal sex hormones. Low interdigital ratio has been associated with high levels of androgens. It has been reported in unrelated women that low 2D:4D ratio is associated with lesbian sexual orientation, but because of the nature of those samples, it was not possible to conclude whether lower ratio (and hypothetically, higher androgen levels) in lesbians are due to differences in genetics as opposed to differences in environment. To test the hypothesis that low 2D:4D in lesbians is due to differences in environment, interdigital ratio data were analyzed in a sample of female monozygotic (MZ) twins discordant for sexual orientation (1 twin was lesbian, the other was heterosexual; n = 7 pairs). A control group of female MZ twins concordant for sexual orientation (both twins were lesbian) was used as a comparison (n = 5 pairs). In the twins discordant for sexual orientation, the lesbian twins had significantly lower 2D:4D ratios on both the right and left hands than their heterosexual cotwins. There were no significant differences for either hand in the twins concordant for sexual orientation. Because MZ twins share virtually the same genes, differences in 2D:4D ratio suggest that low 2D:4D ratio is a result of differences in prenatal environment.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1023/a:1021837211630 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Use of Haloperidol in Companion Psittacine Birds: 19 Cases (2012-2022).
J Avian Med Surg
January 2025
Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA,
The antipsychotic medication haloperidol has been used for many years in avian medicine as a pharmacologic therapy for refractory feather destructive behavior in pet parrots. However, despite its common use, there are no published studies evaluating its efficacy and adverse effects in psittacine birds. The goal of this study was to report the signalment, clinical presentation, dosing regimen, response to therapy, and adverse effects of companion psittacine birds prescribed oral haloperidol therapy at a single veterinary referral hospital.
View Article and Find Full Text PDFA Preliminary Investigation into the Use of Cannabis Suppositories and Online Mindful Compassion for Improving Sexual Function Among Women Following Gynaecological Cancer Treatment.
Medicina (Kaunas)
December 2024
School of Psychology, London Metropolitan University, London N7 8DB, UK.
The impact of gynaecological cancer and its treatments on sexual intimacy can be profound on female sexuality. However, very few registered clinical trials have addressed sexual intimacy among this cohort. This preliminary randomised control trial (RCT) and content analysis assessed the effectiveness of a brief online mindful compassion group intervention adjunct with cannabis suppositories.
View Article and Find Full Text PDFDevelopment of an eHealth Intervention Prototype to Prevent Health Risk Behaviors Among Hispanic Adolescents: A User-Centered Formative Study.
Int J Environ Res Public Health
December 2024
School of Nursing and Health Studies, University of Miami, Coral Gables, FL 33146, USA.
Health risk behaviors continue to disproportionately affect Hispanic youth. Despite the existence of successful family and school-based interventions, there is a need for developing and testing individually-based preventive interventions that are easily accessed and widely disseminated. Therefore, this study aimed to develop a prototype (proof of concept) for an individual-level mobile application (app), informed by Hispanic parents and adolescents, to prevent/reduce drug use and sexual risk behaviors among Hispanic youth.
View Article and Find Full Text PDFCybervictimization and Online Sexual Harassment: Prevalence, Association, and Predictors.
Int J Environ Res Public Health
November 2024
Department of Education, Languages, Intercultures, Literatures and Psychology, University of Florence, Via di San Salvi, 12, Complesso di San Salvi Padiglione 26, 50135 Florence, Italy.
Background: The daily and massive use of the Internet and social media by adolescents has led to increased interest and attention to prevalence rates, risk factors, and potential consequences of different forms of online victimization. This study aims to examine the possible associations between cybervictimization and online sexual harassment among 697 Italian adolescents (M = 15.17; SD = 0.
View Article and Find Full Text PDFContextualized Experiences and Predictors of Condom Use in a Flemish Population: A Mixed Methods Study.
Int J Environ Res Public Health
November 2024
Sensoa, Flemish Expertise Centre for Sexual Health, President Building, F. Rooseveltplaats 12 bus 7, 2060 Antwerpen, Belgium.
This study aims to address the gap in understanding condom use (CU) behavior in Flanders (the Dutch-speaking community in Belgium) by applying a mixed methods approach, integrating both quantitative and qualitative data. Utilizing a large-scale survey of over 14,000 participants and 11 in-depth interviews, the study explores key factors influencing CU, including (amongst others) relationship status, attitudes toward condoms, and STI testing. Quantitative findings highlight significant predictors such as the type of partner (casual vs.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!