In men, one study found that a lower ratio was connected with more success at high-frequency financial trading, while another study associated it with better performance on medical school entrance exams women were not included in those studies. Research has shown, however, that lesbians and female-to-male transgendered people are more likely to have more “male” ratios.įinger-length ratios have been linked previously with a variety of other characteristics: in both males and females, lower ratios are associated with better athletic performance. Most men have index fingers that are shorter (low ratio) than their ring fingers, while most women’s index fingers are the same size or longer (high ratio) than their ring fingers. Higher testosterone levels during fetal development are associated with a lower 2D:4D ratio, while higher estrogen levels are connected with a higher one.

So it’s plausible that the same exposure may affect penis length. Previous studies have linked the so-called 2D:4D ratio of finger length with exposure to the sex hormones estrogen and testosterone in the womb. Tae Beom Kim of Gachon University in Incheon, Korea, wrote. “Based on this evidence, we suggest that digit ratio can predict adult penile size,” the researchers, led by Dr. They data suggested that those with a lower ratio, whose index finger (or second finger, 2D) was shorter than the ring finger (or fourth finger, 4D), had a longer stretched penis length, which is well correlated with erect size. MORE: Add Inches!! (No, Really, Men Can Make It Longer) A different researcher measured the men’s finger lengths, in order to prevent knowledge of one measurement unconsciously affecting the other. A researcher measured the patients’ penile length - flaccid and stretched - just after they went under anesthesia for their operations. The new study was conducted on 144 Korean men who were hospitalized for urological surgery. The lower the ratio, the longer the penis. Just as the amount of prenatal testosterone is responsible for the development of variable finger lengths and in particular the 2D:4D ratio, it is also responsible for penile length.Follow ratio of the length of a man’s index finger to that of his ring finger may seem like a strange thing to measure, but new research suggests that it’s linked with penis size. Recent studies even show that the digit ratio of the right hand is even more susceptible to the activity of the hormone responsible for the development of male characteristics, androgen. Other studies have proven that a high level of foetal testosterone is associated with a low 2D:4D ratio, in other words, the amount of testosterone in a human affects the development of our hands, particularly the lengths of our fingers.

It is believed that the 2D:4D ratio is fixed while humans (and other vertebrates) are still in utero. In males, this is not always the case with many men having a ring finger that is longer than the index finger which results in a 2D:4D ratio that is greater than one. In women, the 2D:4D ratio is generally lower, often less than one, meaning that the length of the index finger is generally close to or longer than the length of the ring finger. The ratio of the length of the second digit to the length of the fourth digit (the 2D:4D ratio) varies between the sexes.

Low 2d 4d ratio penis