Concerns About Testicular Size and Semen Volume: What You Need to Know - Urology

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I would like to inquire about testicular size and prostate issues?


Hello, doctor.
I am 25 years old and have a partner who is four years younger than me.
I have noticed that my testicles are smaller and my semen volume is lower but thicker.
I also find it harder to become lubricated when stimulated.
My partner's testicles are about twice the size of mine, and their semen volume is approximately three times more but thinner.
Recently, I have noticed a decrease in the amount of prostate fluid as well.
The sensation when I ejaculate is still strong, but only a small amount comes out, and it is thick.
This occurs about once every 1 to 3 days, which is different from before.
Could this be due to underdeveloped testicles? Is there a way to restore my development to its previous state? Are there medications or treatments available, or would surgery be necessary?

Xiao Wei, 20~29 year old female. Ask Date: 2018/08/20

Dr. Du Mingyi reply Urology


Testicular size varies among individuals due to differences in body constitution, and this is considered normal.

Reply Date: 2018/08/20

More Info


Concerns regarding testicular size and semen volume can be quite common, especially among younger men. At 25 years old, it’s understandable to have questions about your reproductive health, particularly if you notice differences between yourself and your partner. Let’s break down your concerns and provide some insights based on medical knowledge.

Firstly, it’s important to understand that testicular size can vary significantly among individuals. Factors such as genetics, hormonal levels, and overall health can influence testicular development. Smaller testicles may not necessarily indicate a problem, but they can sometimes be associated with conditions like hypogonadism, where the body doesn’t produce enough testosterone. This can affect not only testicular size but also semen production and sexual function.

Regarding semen volume, the average volume of ejaculate for a healthy male is typically between 2 to 5 milliliters per ejaculation. If you are noticing a decrease in volume, it could be due to several factors, including frequency of ejaculation, hydration levels, and overall health. Semen consistency can also vary; thicker semen can be normal, but if you notice significant changes or discomfort, it may warrant further investigation.

You mentioned that your partner’s testicular size and semen volume are larger than yours, which can lead to feelings of inadequacy. However, it’s crucial to remember that sexual health and fertility are not solely determined by size or volume. Factors such as sperm quality, motility, and overall reproductive health play a significant role in fertility.

If you are concerned about your testicular size and semen volume, it would be advisable to consult a healthcare professional, preferably a urologist or an endocrinologist. They can conduct a thorough evaluation, which may include hormone level testing (like testosterone), semen analysis, and possibly imaging studies to assess the anatomy of your reproductive organs.

In terms of treatment, if a hormonal imbalance is identified, hormone replacement therapy could be an option. This treatment can help restore normal testosterone levels, which may improve testicular size and semen production. Surgical options are generally reserved for specific conditions, such as varicocele or undescended testicles, and would be discussed based on individual circumstances.

Lifestyle factors can also play a significant role in reproductive health. Maintaining a healthy diet, regular exercise, managing stress, and avoiding substances like tobacco and excessive alcohol can positively impact your overall health and potentially improve reproductive function.

In summary, while concerns about testicular size and semen volume are valid, they are best addressed through professional medical advice. A healthcare provider can help determine if there is an underlying issue and guide you on appropriate steps to take, whether that involves lifestyle changes, medical treatment, or further evaluation. Remember, reproductive health is a complex interplay of many factors, and seeking help is a proactive step towards understanding and improving your health.

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