The Connection Between Testosterone, Male Penis Size, And Finger Length Ratio

For any of us who has ever taken a college biology course, we might remember the professor stating the study that showed that men who have more testosterone in their bodies have longer ring fingers than their index fingers, relative to the longest finger which is the middle finger.

Well another study came out recently that showed a correlation between the size of the male penis and the person’s finger length ratio, specifically the ringer finger to the index finger. This type of study can be connected to the previous study about testosterone link to ring finger length.

Obviously longer ring finger length, means greater finger ratios, assuming the index finger is kepted constant and don’t change from an increase in testosterone. The would suggest that an increase in the testosterone in a male’s body would increase the size of the male penis.

The study was reported in the Summer of 2011 and ABC News and CBS News (as well as dozens of other news stations) picked up the story. The article is posted below (source HERE).

Penis size linked to finger measurements, say Korean scientists

(CBS) – Despite the rumors, shoe size and hand size won’t predict a man’s size…down there. What can? Researchers at Gachon University in Incheon, South Korea think they’ve found the answer.

They say two fingers can tell the whole tale.

For the study, published in the Asian Journal of Andrology, researchers looked at the relationship between the size of the second digit, or index finger, and that of the fourth digit, the ring finger – in 144 Korean men aged 20 or older. All these men were in the hospital undergoing urological surgery for conditions unrelated to penis length.

After measuring pre-and post-surgery lengths for all three “digits,” the researchers found the average length between the second and fourth finger was 0.38 inches, and ranged from 0.35 to 0.44 inches, according to LiveScience. These measurements may be too small for the naked eye to notice, but when the researchers compared these finger lengths with penis size, they found the lower the digit ratio, the longer the penis was.

What does that mean?

“According to our data…the shorter index finger than ring finger you have, the longer stretched penile length you have,” Dr. Tae Beom Kim, study author and professor of urology at Gachon University in Incheon, South Korea, told Reuters.

Put your hands down, fellas. These findings may serve as fraternity fodder, but what are the medical implications of studying digit size?

Several studies have linked the distance between the second and fourth finger to sperm count and heart attack risk, LiveScience reported. But finger size has also been linked to other deadly diseases.

Dr. Denise Brooks McQuade, professor of biology at Skidmore College in N.Y, wrote in an accompanying commentary to the study, that digit ratio can help doctors gauge how much testosterone a fetus is exposed to in the womb, which has been linked to an increased risk for hormone-driven diseases like prostate cancer.

She points to a 2011 study that found participants that had an “index finger longer than ring finger were significantly less likely to have prostate cancer.” The authors of that study said a high digit ratio might display a protective benefit these patients have against the disease, according to her commentary.

“Digit ratio is non-invasive and easy to measure, yet may provide clues about an individual’s prenatal history.” McQuade told Reuters. “Combined with other information, digit ratio offers the potential for clinical usefulness.”

Maybe size does matter.

Conclusion: The extra testosterone level is stated to be from the womb that the male was in before birth. When we try to somehow use this type of study for our height increase endeavors, we could make the theory that men who have more testosterone are more likely to exhibit alpha male behavior. If they are more likely to exhibit alpha male behavior, I would guess they are more likely to be taller and bigger than average, There have been already studies that disproved the myth of the Napoleon Complex which showed that taller males are more likely to exhibit dominating and violent tendencies than shorter onces, obviously with a clear correlation to testosterone levels. 

The conclusion I am willing to postulate at is that women who have more testosterone in their systems which reach their male offspring result in the male offspring in being slightly taller than their peers. We know that testosterone in females is linked to slightly stronger sexual drive. This could mean that females who have stronger sexual drives prefer at a instinctual level to mate with taller, more evolutionarily fit men than other women which have lower testosterone levels, who prefer less dominant, alpha male behavior males. 

This could imply that if one desired to have taller and bigger children, it may be better to have a higher testosterone level, whether naturally or through lifestyle changes. 

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