2nd to 4th Digit Ratio and Offspring Sex
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J.T. MANNING; S. MARTIN; R.L. TRIVERS; M. SOLER
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Article
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2002
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Elsevier Science
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English
โ 88 KB
There is evidence that the ratio of the length of the 2nd and 4th digit (2D:4D) is negatively related to prenatal and adult concentrations of testosterone. It has also been reported that high levels of testosterone at conception in both fathers and mothers are associated with an increased sex ratio