Can men's underwear affect sperm count and fertility?

Can men's underwear affect sperm count and fertility?

Fertility is a complex and touchy issue that can be influenced by a variety of factors, including lifestyle, diet, and genetics. However, it may come as a surprise to some that men's underwear can also play a role in male fertility and sperm count. In this article, we'll explore the relationship between men's underwear and fertility, and what men should know about underwear and their reproductive health.

The role of temperature on sperm production

The testicles are responsible for producing sperm, and to do this effectively, they need to be a few degrees cooler than the rest of the body. This is why the testicles are located outside of the body in the scrotum. When the temperature of the testicles rises, it can negatively impact sperm production and decrease fertility. This is why it is not recommended for men to spend prolonged periods of time in a hot tub.

Men's underwear can affect the temperature of the testicles and impact sperm production. Studies have shown that wearing tight-fitting underwear can result in higher scrotal temperatures and lower sperm count, while wearing looser underwear can lead to lower scrotal temperatures and improved sperm quality.

The impact of underwear on sperm motility

In addition to affecting the temperature of the testicles, men's underwear can also impact sperm motility, which is the ability of sperm to swim and reach the egg for fertilization. Sperm motility is crucial for fertility, and any reduction in motility can reduce the chances of successful conception.

Again, tight-fitting underwear can negatively impact sperm motility by compressing the testicles and reducing the flow of blood and oxygen to the sperm. Looser-fitting underwear, on the other hand, allows for better circulation and can help improve sperm motility.

The choice of fabric

In addition to the fit of the underwear, the choice of fabric can also have an impact on fertility. Underwear particularly made of synthetic materials, like polyester and nylon, can trap heat and raise the temperature of the testicles, whereas underwear made of plant based fibers like Cotton, Bamboo, or Modal, are more breathable and thus can help regulate temperature and maintain a cooler environment for sperm production.

It is recommended that men choose underwear made from natural materials, such as cotton or modal, to help maintain a cooler environment for sperm production and improve fertility.


In conclusion, men's underwear can play a role in male fertility by affecting the temperature of the testicles and sperm motility. Tight-fitting underwear, synthetic materials, and high scrotal temperatures can all negatively impact fertility, while looser-fitting underwear made from natural materials can help regulate temperature and improve sperm quality.

It is important for men to consider the type of underwear they wear and how it may be affecting their reproductive health. By making simple changes to their underwear choices, men can help optimize their fertility and increase their chances of successful conception.

Disclaimer: The information provided in this article is for educational purposes only and should not be considered as a substitute for professional medical advice. Readers should always consult with their physician for any concerns regarding their health and well-being. The content in this article does not establish a doctor-patient relationship, and the information provided is not intended to diagnose, treat, cure, or prevent any disease.

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