Does hot weather reduce sperm quality?

Environmental temperature does not directly reduce sperm quality. However, if testicular temperature increases for a long time, it can affect the spermatogenesis process. Unlike other organs located in the abdomen, the testicles are located outside the body to maintain a temperature about 2-4 degrees Celsius lower than body temperature – a necessary condition for spermatocytes to function normally.

Working long hours in the sun, in high-temperature environments, or frequently exposed to heat sources without effective heat regulation methods can cause the temperature in the testicles to increase. Just a prolonged increase in temperature of a few degrees Celsius is enough to affect the activity of lertoli and leydig cells – two types of cells that play a role in nurturing germ cells, supporting spermatogenesis and testosterone production. If these cells do not function effectively, it can reduce the number of sperm produced.

High temperatures also increase oxidative stress – a condition in which more free radicals are produced than the body’s antioxidant system can neutralize. Free radicals can attack cell membranes, mitochondria and sperm DNA, reducing mobility, increasing abnormal deformities, and even damaging genetic material, risking male infertility.

Many studies show that when the testicles are regularly exposed to high temperatures, the sperm production process can be affected, causing their quantity and mobility to decline. However, you don’t need to worry too much if you only experience a few hot days. The body always has a heat regulation mechanism to protect the testicles, and the process of creating a complete sperm takes about 2-3 months. Therefore, effects on sperm quality are often noted when testicular heating is prolonged or repeated over a long period of time.

You should limit exposure to heat sources when possible, drink enough water, wear cool clothes and take appropriate breaks to cool off. Adding natural essences such as eurycoma longifolia, French pine extract and ocean oyster essence can support increased endogenous testosterone production, help maintain the activity of sertoli cells in the testicles, and improve sperm quality.