16 marzo 2015
Research suggests that the ratio of the lengths of the index finger and the ring finger in males may be predictive of a variety of disorders related to disturbed hormonal balance. When the index finger is shorter than the ring finger, this results in a small 2D:4D ratio, pointing to a high exposure to testosterone in the uterus.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/G5F1oHsULiI/150316134920.htm
