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article imageStudy suggests correlation between finger ratio and testes in men

By Mike Rossi     Sep 1, 2014 in Health
Seoul - A new report published on August 12th, 2014 suggests a correlation may exist between finger-digit ratios and male reproductive function.
The study published by the American Society of Andrology — authored by the Department of Urology at Gachon University Gil Hospital, Incheon, Korea and Seoul National University Hospital, Seoul, Korea — specifically explored the correlation between pointer-finger to ring-finger ratios and the overall volume of adult male testes.
Researchers founded their hypothesis in the function of the Hox gene which "controls finger development and differentiation of the genital bud during embryogenesis."
Nearly 180 Korean men of varying age — but all within the range of 20-69 years — enrolled in the study and any subjects known to have alternate conditions strongly influencing testicular volume were dismissed.
A single researcher measured the digit lengths using a caliper and testes volume was taken via orchidometry by a veteran urologist.
At the end of the trials, doctors concluded "age, height, serum testosterone and free testosterone level were not correlated with testicular volume, [while] digit ratio, along with weight, [were] significantly correlated with testicular volume."
However, only digit ratio accurately predicted all testicle (left, right and both) volumes — using weight as a predictor had unspecified limitations.
The findings strongly suggest men with higher pointer-to-ring finger ratios tend to have smaller testicle volumes than men with lower pointer-to-ring ratios.
The full study is available here.
More about testes, Men, Testosterone, Testicles, Male
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