Sexual orientation is associated with 2D:4D finger length ratios in both sexes: an updated and expanded meta-analysis

Frontiers in Psychology, Год журнала: 2025, Номер 16

Опубликована: Апрель 25, 2025

The ratio of the lengths 2nd and 4th fingers (2D:4D) is a putative marker for prenatal gonadal hormone signaling has been linked to human sexual orientation. Although 2D:4D consistently found be lower in males than females, association with orientation variable across studies, one meta-analysis finding (more masculine) digit ratios lesbians heterosexual but no overall males. However, this previous considered neither unpublished datasets nor bisexual individuals separately from homosexual individuals. Moreover, 17 examining relationships between have published since that time, we located an additional 11 datasets. We therefore conducted updated expanded comprising 51 including 44 male 34 female datasets, totaling 227,648 participants. This also explored whether differed and/or non-exclusive both sexes. Results indicate male-typical) women (right hand g = 0.26, left 0.16; adjusted following trim-and-fill), higher female-typical) men -0.17, -0.20; adjusted) compared same-sex counterparts. Moderator analyses do not support publication bias females. For males, positive findings were more likely published, robustness tests, trim-and-fill leave-one-out, findings' robustness. No significant differences observed or These are consistent evidence androgens increase attraction females estrogens

Язык: Английский

---

Is digit ratio (2D:4D) a biomarker for lactate in women? Evidence from a cardiopulmonary test on professional female footballers

Early Human Development, Год журнала: 2025, Номер 203, С. 106224 - 106224

Опубликована: Фев. 20, 2025

Язык: Английский

---

The Relationship Between Digit Ratio (2D:4D) and Aspects of Cardiorespiratory Fitness: A Systematic Review and Meta‐Analysis

American Journal of Human Biology, Год журнала: 2025, Номер 37(4)

Опубликована: Апрель 1, 2025

Digit ratio (2D:4D), a proxy of prenatal testosterone exposure, is putative marker physical fitness. No study has comprehensively synthesized studies examining associations between 2D:4D and cardiorespiratory fitness (CRF). We aimed to systematically review meta-analyze reporting aspects CRF. searched the literature for full text, refereed, cross-sectional Pearson's correlation coefficients objectively measured at least one aspect CRF was assessed using field-based measures (maximal long-duration exercise performance) or laboratory-based oxygen uptake [VO2max], ventilatory threshold [VT], mechanical efficiency [ME]). used random-effects meta-analysis estimate pooled 95% confidence interval (95% CI) CRF, moderator analyses influence sex age. Data from 22 studies, representing 5293 individuals (54% male; mean age range = 10.1-40.2 years) 12 countries were included. found significant strong negative VT (r -0.61, CI -0.78, -0.37) weak performance -0.18, -0.25, -0.10), indicating that with lower 2D:4Ds had higher better performance. correlations VO2max ME. Neither nor moderators, except which moderated some like tolerance (i.e., VT) performance, but not other aerobic capacity efficiency.

Язык: Английский

---

Potential Predictor of Epigenetic Age Acceleration in Men: 2D:4D Finger Pattern

American Journal of Human Biology, Год журнала: 2024, Номер unknown

Опубликована: Сен. 6, 2024

Second to fourth digit ratio is widely known indicator of prenatal sex hormones proportion. Higher androgenization results in longer finger and lower 2D:4D index. The aim this study was determine whether the associated with DNA methylation (DNAm) age dependently on sex.

Язык: Английский

---

Special Issue “Biological and Psychological Perspectives”: Guest editorial

Early Human Development, Год журнала: 2024, Номер unknown, С. 106127 - 106127

Опубликована: Окт. 1, 2024

Язык: Английский

---