Relative Lengths of Fingers and Toes in Human Males and Females

  title={Relative Lengths of Fingers and Toes in Human Males and Females},
  author={Dennis McFadden and Erin Shubel},
  journal={Hormones and Behavior},
Digital scans of the hands and feet were obtained from 62 heterosexual females and 60 heterosexual males. Scans only of the hands were obtained from 29 homosexual females and 35 homosexual males. The lengths of the individual fingers and toes were estimated from those images by two experienced judges, and length ratios were constructed for all possible pairs of fingers (or toes) on each hand (or foot). Thumbs were not measured, but the great toe was measured and used to construct length ratios… 

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Digit ratio, 2D:4D (Index finger: Ring finger) in the right and left hand of males and females in Malaysia

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Length of index and ring fingers differentially influence sexual attractiveness of men’s and women’s hands

Results have broad implications for sexual selection studies also in nonhuman taxa because the genetic mechanisms that link digit development to sex hormones may be mediated by Hox genes which are conserved in vertebrates.

Study of Aggressive Behavior of an Individual from Ratio of Index and Ring Fingers' Length

Physical aggression is more in male but verbal aggression, anger and hostility are more in female and ratio of index finger and ring finger (2D:4D) is higher in female.

Sex Determination using Finger Length, Fingers Ratio, and Foot Dimensions in Fayoum Governorate

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The ratio of 2nd to 4th digit length and male homosexuality.

  • RobinsonManning
  • Psychology, Medicine
    Evolution and human behavior : official journal of the Human Behavior and Evolution Society
  • 2000

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Comparison of Auditory Evoked Potentials in Heterosexual, Homosexual, and Bisexual Males and Females

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Finger-length ratios and sexual orientation

The androgen-sensitive pattern of finger lengths is examined, and there is evidence that homosexual women are exposed to more prenatal androgen than heterosexual women are, and men with more than one older brother, who are more likely than first-born males to be homosexual in adulthood, are exposure to more pregnancies than eldest sons.

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The Relation Between Sexual Orientation and Penile Size

On all five measures of penile length and circumference, homosexual men reported larger penises thandid heterosexual men, and Explanations for these differences are discussed.