Archives of Sexual Behavior

, Volume 34, Issue 3, pp 335–340 | Cite as

Digit Ratio (2D:4D) in Homosexual and Heterosexual Men from Austria

Article

Abstract

Neurohormonal theories of sexual orientation emphasize the organizational effects of testosterone on the developing brain. A recent suggestion, that the ratio of the length of the 2nd and 4th digits (2D:4D) is negatively correlated with prenatal testosterone, has led to a number of studies of 2D:4D in homosexual and heterosexual men and women. The results have been mixed. In comparison to heterosexual men, mean 2D:4D in gay men has been reported to be hypermasculinized (lower 2D:4D), hypomasculinized (higher 2D:4D), or to show no significant difference. Here, we report mean 2D:4D in Austrian homosexual and heterosexual men. We found no significant difference between means for homosexual and heterosexual 2D:4D, with values for both falling between 0.96 to 0.97. There are now 6 reports of 2D:4D in heterosexual and homosexual men. Considering Caucasian men, the studies from the United States show low heterosexual mean 2D:4D, and homosexual mean 2D:4D is higher or similar to that of heterosexuals. The European studies show high heterosexual mean 2D:4D, and comparisons with homosexuals reveal the latter to have lower or similar mean 2D:4D to that of heterosexuals. We discuss these results in relation to the suggestion that mean 2D:4D in heterosexual men differs across populations but mean 2D:4D in homosexuals shows less geographical variation (the “uniform mean hypothesis”). It is concluded that more data are required to clarify whether or not there is a 2D:4D effect for sexual orientation in men.

Key Words

homosexuality digit ratios 2D:4D 

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Copyright information

© Springer Science + Business Media, Inc. 2005

Authors and Affiliations

  • Martin Voracek
    • 1
  • John T. Manning
    • 2
    • 4
  • Ivo Ponocny
    • 3
  1. 1.Department of PsychologyUniversity of ViennaViennaAustria
  2. 2.Department of PsychologyUniversity of Central LancashirePrestonEngland
  3. 3.Statistics AustriaViennaAustria
  4. 4.Department of PsychologyUniversity of Central LancashirePrestonEngland

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