CentralNotice From Wikipedia, the free encyclopedia Jump to navigation Jump to search Not to be confused with Benford's law about the frequencies of leading digits of numbers. Hand with index finger being shorter than the ring finger, resulting in a small 2D:4D ratio, pointing to a high exposure to testosterone in the uterus. The digit ratio is the ratio of the lengths of different digits or fingers typically measured from the midpoint of bottom crease (where the finger joins the hand) to the tip of the finger. [1] The ratio of two digits in particular, the 2nd ( index finger ) and 4th ( ring finger ), is affected by exposure to androgens , e.g., testosterone while in the uterus and that this 2D:4D ratio can be considered a crude measure for prenatal androgen exposure, with lower 2D:4D ratios pointing to higher prenatal androgen exposure. [2] [3] [4] [5] [6] [7] [...