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 
. The 2D:4D ratio is calculated by dividing the length of the index finger of the right hand by the length of the ring finger of the right hand. Personality is defined as the set of habitual behaviors, cognitions and emotional patterns that evolve from biological and environmental factors 
. It is a characteristic way of thinking, feeling, and behaving. The main purpose of the study was to find out the relationship between digit ratio (2D:4D) with different personality traits among young adult women.
Methodology: A total of 73 young adult women college students having the age of 21 to 30 years were selected randomly as subjects for the present study. All the subjects were studying in college level. Criterion measure for this study were length of index finger (2D) and ring finger (4D) of right hand and personality traits. Instruments and tools used to collect data in this study were small sliding breadth caliper (Varner’s scale) and the Cattell’s Sixteen Personality Factor Questionnaire (16PF). Mean and stander deviation (SD) have been considered for descriptive statistics and correlation coefficient was calculated by Person Product Moment method. Only 0.05 levels has considered for the present study. All statistical calculations have been done by using standard statistical software.
Results: Results revealed that the personality factors of B, C, D, E, F, H, I, M, N, Q1 and Q2 have positive correlation with 2D:4D whereas personality factors of A, G, L, O, Q3 and Q4 had negative correlation with 2D:4D. Highest positive r-value was found for personality traits F (0.355) which was statistically significant whereas the highest native correlation was found for personality traits A, L and Q4.
Conclusions: From the result of the study it was concluded that digit ratio has significant positive correlation with Personality Trait-F i.e. Liveliness among young adult women. Except this factor there was no correlation between digit ratio with other personality traits among young adult women.