Finger length ratios across multiple populations.
Population (P = Poland; S = Spain; E = England; H = Hungary [EH = ethnic Hungarians, HG = Hungarian Gypsies]; G = Germany; Z = Zulu; J = Jamaica; F = Finland) and sex differences (f = female and m = male) in mean 2D:4D with standard error bars). http://www.ncbi.nlm.nih.gov/pubmed/10828555
In this study, Finnish men had the lowest 2D:4D among the white men and all men sampled, and the male-female gap was greatest among the Finnish.
In another study on some European populations, Swedish men had the lowest 2D:4D, Swedish women the highest 2D:4D, and the male-female gap was greatest among the Swedes (the Swedish/London sample included Swedes born in Sweden and living in London; http://www.ncbi.nlm.nih.gov/pubmed/16350659).
Another study on a Lithuanian sample found 2D:4D ratios lower than in most white/other populations and did not report higher 2D:4D values in individuals with lighter hair: http://www.ncbi.nlm.nih.gov/pubmed/18041401
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