Increased hand digit length ratio (2D:4D) is associated with increased severity of hypospadias in pre-pubertal boys
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DOI: 10.1007/s00383-019-04600-3
Abstract: Introduction Hypospadias is a common congenital male disorder, with much research focusing on prenatal androgen exposure as a causative factor. Whilst digit length ratios were apparent in sexual dimorphism since the nineteenth century, their role… read more here.
Keywords: hypospadias; digit length; anogenital distance; length ratio ... See more keywords
A comprehensive allometric analysis of 2nd digit length to 4th digit length in humans
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DOI: 10.1098/rspb.2017.0356
Abstract: It has been widely reported that men have a lower ratio of the 2nd and 4th human finger lengths (2D : 4D). Size-scaling ratios, however, have the seldom-appreciated potential for providing biased estimates. Using an… read more here.
Keywords: length; comprehensive allometric; digit length; allometric analysis ... See more keywords
The Ratio of Second and Fourth Digit Length: A Biomarker for Methamphetamine Dependence?
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DOI: 10.9758/cpn.2022.20.4.694
Abstract: Objective The ratio of 2nd and 4th digit length (2D4D) is considered to be a sexually dimorphic trait. Low 2D4D is implicated in alcohol dependence and heroin dependence and correlated with psychological traits such as… read more here.
Keywords: biomarker; meth dependence; digit length; group ... See more keywords