Objective: This study aimed to determine whether various body mass index (BMI) value ranges and the 2D:4D ratio are related.

Materials and Methods: The individuals included in the study were divided into 6 groups based on their BMI as follows: Thin (BMI < 18.5), normal weight (BMI=18.5 – 24.9), overweight (BMI=25 – 29.9), obese category I (BMI=30 – 34.9), obese category II (BMI=35 – 39.9), and obese category III (BMI> 40). Each group consisted of 20 women and 20 men, making a total of 240 individuals.

Results: The 2D:4D ratio in normal weight (BMI= 18.5–24.9) individuals were more than 1 in women and less than 1 in men. Low BMI values were associated with higher 2D: 4D ratios in men and lower 2D: 4D ratios in females. Similarly, the 2D: 4D ratio increased in men and decreased in women with increasing BMI value categories. However, these increases in men and decreases in women based on increased BMI values were not statistically significant.

Conclusion: These results demonstrate the relationship between BMI and the 2D:4D ratio in both sexes. In other words, according to our current results, 2P: 4P ratio is thought to be an indicator of obesity. Therefore; in light of these data, we think that it is important to map the 2D:4D ratio in the population starting from the time of birth for preventing obesity in the future.