4 citations,
August 2017 in “Journal of Cosmetic Dermatology” Finger length ratio may indicate male hair loss.
December 2022 in “The Aging Male” Lower 2D:4D ratio and older age increase the risk of severe hair loss in men.
3 citations,
June 2016 in “Dermatology Reports” Finger length ratios don't predict baldness in men.
October 2023 in “Dermatology practical & conceptual” Finger length ratios might help predict common hair loss.
Digit ratio likely doesn't predict male hair loss.