JT Manning, L Barley, J Walton, DI Lewis-Jones… - Evolution and Human …, 2000 - Elsevier
The ratio between the length of the 2nd and 4th digit (2D: 4D) is sexually dimorphic, with
mean male 2D: 4D lower than mean female 2D: 4D. It recently was suggested that 2D: 4D is …