![]() The 2D:4D finger ratio was used as an indicator of prenatal androgen presence, and evidence was found that homosexuality in both sexes is more likely with higher prenatal androgen exposure. Īnimal models have indicated that androgenic steroid (especially, testosterone) exposures before birth might influence sexual orientation, and this could also be true for adult humans. įinger ratios have been found to be related to career and occupational interests, , and handwriting style for women but not men. Higher, more feminine finger ratios appear to be correlated to depression severity in women but not men, personality traits in females, and estrogen and prolactin levels in women. The 2D:4D ratio appears to be influenced by prenatal exposure to androgenic hormones in the womb.Ī lower, more masculine finger ratio appears to be correlated to attitudes of gratitude greater aggression or hostility, increased spatial ability and sensation- seeking in men, lower pain perception reduced male depression greater agreeableness and less quarrelsomeness of men with women sexual attractiveness in men sperm count and testosterone levels in men increased incidences of preschool disruptive behavior in young girls but not boys faster skiing times in men and women delayed menarche in girls and a variety of other physical and psychological traits. It is sexually dimorphic, with male 2D:4D ratios (≈0.95) lower than those for women (≈1.0). This ratio has been shown to be different for male and female humans and animals. The ratio of the length of the second (index) finger to the length of the fourth (ring) finger on the right hand is termed the 2D:4D ratio (Figure 1). ![]()
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