November 2025 in “Journal of Medicine and Health Technology” No link between finger length ratios and color blindness was found.
8 citations
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April 2016 in “Anais Brasileiros De Dermatologia” Right hand finger ratio may predict male hair loss.
32 citations
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February 2017 in “Human Reproduction” Women with polycystic ovary syndrome tend to have a longer anogenital distance.
3 citations
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February 2019 in “Disease Markers” The index to ring finger ratio may indicate disease severity in female ankylosing spondylitis patients, but not in males.
40 citations
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January 2013 in “Frontiers in Endocrinology” Finger length ratios are not linked to the number of specific gene repeats affecting testosterone sensitivity.