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Do Testicles Get Bigger With Age?

From the mailbag..

Hi Mark,

Do testicles get bigger with age?

I have a coworker who fancies himself as a health expert.

I told him about your site and some of the things I was doing and he told me I was wasting my time because men’s testicles grow as they get older.

Out of the five guys I work with he looks the most unhealthy, so I don’t put much stock in what he says, but I’d like to hear your comments on this.

Thanks WG

Hello WG,

If your buddy was talking about women, and if they actually had testicles instead of ovaries, he would be absolutely right.

Because a woman’s estrogen levels begin to decline as she approaches menopause.

And since high estrogen is the number one cause of testicular atrophy in humans, this would be a good thing from a testicle perspective.

Problem is, women don’t have testicles. Men do.

And as we advance in age our estrogen levels don’t normally go down, they go up.  Sometimes quite dramatically.

As a matter fact, it’s common knowledge that estradiol levels in the average 55 year old man are higher than in the average 55 year old woman.

This fact alone is enough to blow your friend’s theory right out of the water.

But that’s not all…

If you were to walk into any fertility clinic world wide and ask the lead physician if testicles really do get bigger with age, he’d probably laugh right in your face.

Because a fertility expert knows better than anyone else that this theory is total bunk.

As a matter of fact, for every 100 men who walk into his clinic, 75 will have dysfunctional testicles, which more than likely produce dysfunctional sperm.

The sperm these men create often has a two tails instead of one, no tail at all or a head that is deformed and not shaped normally.

And this problem gets worse as a man ages, not better.

In a paper published in 2002 titled: The Association of Age and Semen Quality in Healthy Men, scientists tracked and examined semen samples from a group of men aged 22 – 88.

They found that semen volume, concentration and count all significantly decreased, year by year as these men got older.

They concluded their paper with this quote:

In a convenience sample of healthy men, semen volume and motility decreased continuously between 22–80 years of age, with no evidence of a threshold.

This no evidence of a threshold comment means this trend never stops, no matter how old a man gets.

Even your friend would have to admit that a continuous decline in semen volume from 22 years of age on up doesn’t do much to support his theory…

Because there’s a direct relationship between semen synthesis and your testicular size, meaning the less semen you produce, the smaller your testicles are going to be.


I could easily keep going with this and write an entire thesis on the subject with volumes of references and show you more about whether testicles get bigger with age, but I think we’ve made our point here.

The take home mesage is this…

The forces of nature are working against you, and the older you get the harder you need to work to keep your testicles functioning at a high level.

There’s no arguing this point.

So the next time someone tells  you that testicles get bigger with age… You’ll know the truth.



Is the Quality of Donated Semen Deteriorating? http://www.ncbi.nlm.nih.gov/pubmed/22891399

The Association of Age and Semen Quality in Healthy Men http://www.ncbi.nlm.nih.gov/pubmed/12571189

P450-aromatase Activity in Human Testicular Tissues With Severe Spermatogenic Failure. http://www.ncbi.nlm.nih.gov/pubmed/19906189

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