2D:4D finger-length ratios in children and adults with gender identity disorder

@article{Wallien20082D4DFR,
  title={2D:4D finger-length ratios in children and adults with gender identity disorder},
  author={Madeleine S. C. Wallien and Kenneth J. Zucker and Thomas D Steensma and Peggy T Cohen-Kettenis},
  journal={Hormones and Behavior},
  year={2008},
  volume={54},
  pages={450-454}
}

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References

SHOWING 1-10 OF 50 REFERENCES
Finger Length Ratio (2D:4D) in Adults with Gender Identity Disorder
TLDR
The results indirectly point to the possibility of a weak influence of reduced prenatal testosterone as an etiological factor in the multifactorially influenced development of MtF GID, where the development of FtM GID seems even more unlikely to be notably influenced by prenatal testosterone.
Sexual Dimorphism in the Prenatal Digit Ratio (2D:4D)
TLDR
The 2D:4D ratio, thus, seems to increase after birth in both men and women, with the second digit growing faster than the fourth digit (positive allometric growth of digit two) and perhaps more so in women than in men.
On the Relation Between 2D:4D and Sex-Dimorphic Personality Traits
TLDR
The 2D:4D digit ratio may be a valid, though weak, predictor of selective sex-dependent traits that are sensitive to testosterone.
Masculinized Finger Length Patterns in Human Males and Females with Congenital Adrenal Hyperplasia
TLDR
Results are consistent with the idea that prenatal androgen exposure reduces the 2D:4D and plays a role in the establishment of the sex difference in human finger length patterns, and finger lengths may offer a retrospective marker of perinatal androgens exposure in humans.
A follow-up study of girls with gender identity disorder.
TLDR
The rates of GID persistence and bisexual/homosexual sexual orientation were substantially higher than base rates in the general female population derived from epidemiological or survey studies and there was some evidence of a "dosage" effect, with girls who were more cross-sex typed in their childhood behavior more likely to be gender dysphoric at follow-up and to have been classified as bisexual/Homosexual in behavior.
Psychosexual outcome of gender-dysphoric children.
TLDR
Both boys and girls in the persistence group were more extremely cross-gendered in behavior and feelings and were more likely to fulfill gender identity disorder (GID) criteria in childhood than the children in the other two groups.
Fetal development of the hand, digits and digit ratio (2D:4D).
Relative Lengths of Fingers and Toes in Human Males and Females
TLDR
For both homosexual females and homosexual males, nearly all of the length ratios for fingers were intermediate to those for heterosexual females and heterosexual males; that is, the ratios of homosexual females were masculinized and those of homosexual males were hypomasculinized, but few of these differences were significant.
The biology of human psychosexual differentiation
  • L. Gooren
  • Biology, Psychology
    Hormones and Behavior
  • 2006
...
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