Digit ratio 2D:4D is a possible indicator for androgenetic alopecia in males.
Mehmet UnalPublished in: Journal of cosmetic dermatology (2017)
The left-hand digit ratio 2D:4D is lower in AGA patients, and therefore, left-hand digit ratio 2D:4D can be used as an estimation tool for AGA development in future. There is not any correlation between digit ratio and age of onset. Also, there is no correlation between digit ratio 2D:4D and AGA severity.