Men who have the ring finger longer than the index are more aggressive and quarrelsome. Many studies on both human, and non-human, animals suggest that inter-individual variation in adult aggressiveness is largely organised by prenatal exposure to androgens. He conducted a study on digit ratios sugg esting a positive correlation in males between aggressive tendency and the ratio of the lengths of the ring finger to his index finger. Hurd is an academic specialising in biology and his research primarily f ocuses on the study of the evolution of aggressive behavior, including investigation of aggression, communication and other behavior. Studies in mice indicate that prenatal androgen acts primarily by promoting growth of the fourth finger. testosterone while in the uterus and that this 2D:4D ratio can be considered a crude measure for prenatal androgen exposure, with lower 2D:4D ratios pointing to higher androgen exposure. It has been suggested by some scientists that the ratio of two digits in particular, the 2nd (index finger) and 4th (ring finger), is affected by exposure to androgens e.g. A smaller ratio between the second and fourth fingers is linked to a longer stretched penis size, (as reported by researchers in the Asian Journal of Andrology).Bem female sex role score in women and high digit ratio “feminine” erotic sex role preference in gay men and low digit ratio.Paraphilic (or extreme fetish) sexual interest in males and high digit ratio.Musical ability in males and low digit ratio.Higher exam scores among male students and high digit ratio.Personality traits correlated with low or high digit ratio.Aggression in males and low digit ratio.Assertiveness in females and low digit ratio.Reduced performance in sports and high digit ratio.Increased Anxiety in males and high digit ratio.Reduced risk of alcohol dependency and high digit ratio.Increased risk for depression in males and high digit ratio.Reduced birth size in males and high digit ratio.Reduced risk for prostate cancer and high digit ratio.Risk of obesity and metabolic syndrome in males and high digit ratio.Increase risk for heart disease in males and high digit ratio.Lowered sperm counts and high digit ratio.Below is a non-exhaustive list of some traits that have been either demonstrated or suggested to correlate with either high or low digit ratio. Some authors suggest that digit ratio correlates with health, behavior, and even sexuality in later life. Hormones testosterone and estrogen exposure reflects in fetal life. There is some evidence that 2D:4D ratio may also be indicative for human development and growth. The 2D:4D digit ratio is sexually dimorphic: while the second finger is typically shorter in both females and males, the difference between the lengths of the two digits is greater in males than females.Ī number of studies have shown a correlation between the 2D:4D digit ratio and various physical and behavioral traits. Hand with index finger being shorter than the ring finger, resulting in the small ratio between 2D/4D, points to a high exposure to testosterone in the uterus. The digit ratio is the ratio of the lengths of different fingers (or digits). The study on the hands never ceases to surprise us, after palmistry, foretelling the future through the study of the palm, others but more serious studies reveal our personality through the length of the fingers. Show me your hand and I’ll tell you who you are!
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