Normal Variations in Male Reproductive Anatomy - Urology

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Please consult a doctor about the structure of the reproductive organs?


Hello, doctor.
Recently, I've noticed hair starting to grow on my genital area, and I have two concerns regarding my genitalia that I would like to ask you about.
First, is it normal for one of my testicles to sometimes feel lower or slightly misaligned? Second, I can feel two thick tubes connected to the back of the testicles; are those arteries or the vas deferens? I'm a bit worried that it might be an abnormal structure, as I've been paying special attention while showering and noticed these things more since the hair has started to grow.
Thank you.

Mr. Chen, 10~19 year old female. Ask Date: 2020/10/23

Dr. Du Shixi reply Urology


Hello: First, is it normal to sometimes feel that one testicle is lower or slightly displaced? --> Normal.
Second, when I feel behind the testicles, I can touch two thick tubes; are those arteries or the vas deferens? --> Most likely the vas deferens.
Wishing you good health.

Reply Date: 2020/10/23

More Info


It's completely normal to have questions and concerns about your reproductive anatomy, especially during puberty when your body is undergoing many changes. Let's address your two questions regarding the appearance and sensation of your testicles.

Firstly, it's common for one testicle to hang lower than the other. This asymmetry is a normal anatomical variation and is observed in most males. The reason for this is primarily to prevent the testicles from compressing against each other, which could potentially affect sperm production and overall testicular health. The left testicle often hangs lower than the right, but this can vary from person to person. If you notice that one testicle feels significantly different in size or shape compared to the other, or if you experience pain, swelling, or any other unusual symptoms, it would be wise to consult a healthcare professional for further evaluation.

Secondly, the two "thick tubes" you feel behind the testicles are likely the epididymis and the vas deferens. The epididymis is a coiled tube where sperm mature and are stored, while the vas deferens is the duct that transports sperm from the epididymis to the ejaculatory duct. These structures are essential components of the male reproductive system and are entirely normal to feel. They can sometimes be more prominent or noticeable, especially if you are more aware of your body during this time of change.

It's also worth noting that as you go through puberty, you may notice changes in hair growth, skin texture, and other secondary sexual characteristics. These changes are driven by hormonal fluctuations, particularly testosterone, which plays a crucial role in male development. If you have any concerns about the changes you're experiencing, whether it's related to hair growth, body shape, or any other aspect of your development, don't hesitate to reach out to a healthcare provider. They can provide reassurance, answer your questions, and help you understand what is typical for your age and stage of development.

In summary, both the asymmetry of your testicles and the structures you feel behind them are normal variations in male anatomy. However, if you have any concerns about your health or development, it's always best to consult with a medical professional who can provide personalized advice and support. Remember, your body is going through a lot of changes, and it's perfectly okay to seek guidance during this time.

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