Archives of Sexual Behavior

, Volume 38, Issue 1, pp 1–3 | Cite as

Latitudinal Gradient in 2D:4D

  • Samuli Helle
  • Toni Laaksonen
Letter to the Editor
The potential dependence of second-to-fourth digit ratio (2D:4D) on latitude has been discussed in recent papers in this journal (Hurd & van Anders, 2007; Loehlin, McFadden, Medland, & Martin, 2006, 2007). Such an association was first suggested by Manning ( 2002), who proposed that 2D:4D was highest at intermediate latitudes and lowest at the equator and at high latitudes. In their Fig.  1, Hurd and van Anders ( 2007) plotted the combined data of Loehlin et al. ( 2006) and Manning ( 2002). This figure shows a clear positive latitudinal trend in 2D:4D, except that data from Finland seem an outlier from this otherwise rather linear trend. Thus, the suggestion of low 2D:4D at high latitudes depends critically on these data from Finns.


Cervical Cancer High Latitude Northern Latitude Sami Latitudinal Variation 
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  1. Barut, G., Tan, Ü., & Dogan, A. (2008). Association of height and weight with second to fourth digit ratio (2D:4D) and sex differences. Perceptual and Motor Skills, 106, 627–632.PubMedCrossRefGoogle Scholar
  2. Fink, B., Neave, N., & Manning, J. T. (2003). Second to fourth digit ratio, body mass index, waist-to-hip ratio, and waist-to-chest ratio: Their relationship in heterosexual men and women. Annals of Human Biology, 30, 728–738.PubMedCrossRefGoogle Scholar
  3. Helle S., & Lilley T. (in press). Maternal 2nd to 4th digit ratio does not predict lifetime offspring sex ratio at birth. American Journal of Human Biology.Google Scholar
  4. Hurd, P. L., & van Anders, S. M. (2007). Latitude, digit ratio, and Allen’s and Bergman’s rules: A comment on Loehlin, McFadden, Medland, and Martin (2006) [Letter to the Editor]. Archives of Sexual Behavior, 36, 139–141.PubMedCrossRefGoogle Scholar
  5. Littell, R. C., Milliken, G. A., Stroup, W. W., & Wolfinger, R. D. (2006). SAS system for mixed models (2nd ed.). Cary, NC: SAS Institute Inc.Google Scholar
  6. Loehlin, J. C., McFadden, D., Medland, S. E., & Martin, N. G. (2006). Population differences in finger-length ratios: Ethnicity or latitude? Archives of Sexual Behavior, 35, 739–742.PubMedCrossRefGoogle Scholar
  7. Loehlin, J. C., McFadden, D., Medland, S. E., & Martin, N. G. (2007). Height and 2D:4D within and between ethnic groups: Reply to Hurd and van Anders (2007) [Letter to the Editor]. Archives of Sexual Behavior, 36, 143.CrossRefGoogle Scholar
  8. Manning, J. T. (2002). Digit ratio: A pointer to fertility, behaviour, and health. New Brunswick, NJ: Rutgers University Press.Google Scholar
  9. Manning, J. T., Barley, L., Walton, J., Lewis-Jones, D., Trivers, R. L., Singh, D., et al. (2000). The 2nd:4th digit ratio, sexual dimorphism, population differences, and reproductive success: Evidence for sexually antagonistic genes. Evolution and Human Behavior, 21, 163–183.PubMedCrossRefGoogle Scholar
  10. Manning, J. T., Scutt, D., Wilson, J., & Lewis-Jones, D. I. (1998). The ratio of second to fourth digit length: A predictor of sperm numbers and concentrations of testosterone, luteinizing hormone and oestrogen. Human Reproduction, 13, 3000–3004.PubMedCrossRefGoogle Scholar
  11. Neave, N., Laing, S., Fink, B., & Manning, J. T. (2003). Second to fourth digit ratio, testosterone and perceived male dominance. Proceeding of the Royal Society of London: Series B, 270, 2167–2172.Google Scholar
  12. Rahman, Q., Korhonen, M., & Aslam, A. (2005). Sexually dimorphic 2D:4D ratio, height, weight, and their relation to number of sexual partners. Personality and Individual Differences, 39, 83–92.CrossRefGoogle Scholar
  13. Tester, N., & Campbell, A. (2007). Sporting achievement: What is the contribution of digit ratio? Journal of Personality, 75, 663–677.PubMedCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  1. 1.Section of Ecology, Department of BiologyUniversity of TurkuTurkuFinland

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