[Knowledge] Can a man really live longer if he loses his testicles?

Preface

It doesn't seem to be an uncommon hearing that men have a shorter lifespan than women, and there have even been studies proving this state of affairs for a long time now.

Does life expectancy have to be a gender dichotomy?

In Chinese history, there was such a group - eunuchs, they may be incomplete for life, but they live longer than ordinary men, don't believe it, there is a real scientific basis!

A researcher has published this fact on eLife, stating that men do live longer after castration, what's going on?

There is an unexpected benefit to men without testicles!

In 1969 a scientist compared 935 normal men with 297 castrated men and found that the average life expectancy of normal men was at 64.7 years, while castrated men lived about 70.7 years, suggesting that the presence or absence of testicles does indeed affect longevity.

The journal Current Biology subsequently published a related study in which researchers collected the life expectancy records of 81 registered eunuchs in Korean history and found that the average life expectancy of these eunuchs exceeded 70 years, which was 14.4-19.1 years longer than the normal male life expectancy at the time!

The researchers agreed that men without testicles might actually cause a difference in life expectancy.

Not coincidentally, this difference is not only seen in the human body, but it seems to be similar in the animal kingdom as well.

A joint team of researchers from the University of Otago in New Zealand and the University of California, Los Angeles have attempted to explain the difference in lifespan between castrated and normal rams by looking at the differences in their DNA, and the study has attracted a lot of attention since it was published in the journal eLife.

It is reported that the researchers through the observation of the two rams based on DNA modification of the “epigenetic clock” performance, found that there is a sex-specific aging effect in the DNA, castrated rams appeared androgen-dependent hypomethylation, with some female characteristics, thereby slowing down the rate of aging, this discovery for the male aging rate sex-differentiation mechanism, which provides new ideas.

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80% of men's testicles are different in height and size on both sides

If men look closely at their testicles, it is easy to find that both sides of the testicles are not symmetrical growth, but a small, high and low, this situation also makes many men worry about whether they have any problems?

In fact, the man's bilateral testicles are not completely symmetrical growth of the situation is very common, one side high and one side low may be the two sides of the testicular development rate is different, so there will be two sides of the testicular height difference of about 1 centimeter.

According to Canadian researchers and scholars on 4,333 male samples of testicular symmetrical growth survey found that about 80% of the men in the sample have different testicular height and size.

Some people may even experience different sizes of testicles at different ages, but such differences are actually normal.

For example, before the age of 10, the male “testicles” are only 1~3 milliliters, but with age, after the age of 10, because of the rapid development of puberty, the male “testicles” also rapidly increase in size, and its volume can reach the normal adult level in adulthood.

However, after the age of 60, because of the aging of the body, the size of male “testicles” will gradually shrink to below 16 milliliters.

Many people believe that the larger the testicles are, the more hormones will be secreted and the more powerful they will be in that area, is there any basis for this belief?

In fact, the volume of adult male testicles is basically 15~25ml, as long as the function is normal, the androgen secreted by them will not be too different, and too big testicles are not necessarily a good thing, such as epididymitis, testicular syringomyelia, testicular tumors and other disease risk is also greater.

Is it normal to have a thread in the middle of your testicles?

Guys who have looked closely at the appearance of their testicles will surely have noticed that there is a line running down the middle of the two balls.

Anatomically, this line is called the scrotal suture and is a normal physiological phenomenon that is an evolutionary residue.

In the early stages of embryonic development, our reproductive systems are undifferentiated; in other words, both men and women share a common set of genitals.

It was only with the influence of sex hormones that the genitals became sexually differentiated.

And that line is the organ, formed as it gradually closes, and it serves mainly to localize it.

Since the scrotal line is located in the middle, it helps the doctor to differentiate between the left and right testicles, and when performing scrotal or testicular surgery, this line can also be used as a locating point for the surgical incision.

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So, stop worrying blindly when you find this line.

The real thing to pay attention to is:

• Confirm whether there is an absent testicle, a single testicle or multiple testicles;
• Confirmation of any cryptorchidism or ectopic conditions;
• Confirmation of whether there is atrophy, enlargement or hypoplasia

Conclusion

Although “men live longer without testicles” may sound like a joke, there is some scientific evidence based on research data.

Of course, no one would ever voluntarily lose their testicles just to live a few more years.

But these studies at least remind us that male longevity is closely related to hormone levels and lifestyle.

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