Higher temperatures interfere with sperm production leading to poor sperm count. A man's testicles rests outside the body in the scrotum rather than in the abdomen like the ovaries because the ideal temp for sperm production is 3 to 4 degrees below normal body temp. Any warmer will affect sperm count, reducing it by about 40% per 1-degree rise.
Curejoy Expert Dipti Mothay Explains:
Sperm production, requires an environment about four degrees cooler than the body temperature. According to the World Health Organization, if a man’s sperm count is less than 20 million per milliliter, he is considered at risk of being infertile. There are several factors that can lead to a low sperm count, but one of the most prevalent is exposure to excessive heat.
A new study finds that heat from frequent sauna visits can lower men’s sperm production, though the effect is probably temporary.
How heat exposure from sauna baths impact fertility?
Higher temperatures interfere with sperm production; hence regular exposure to sauna heat would lead to reduced sperm count. If sperm are exposed to elevated temperatures, they begin to die. If the exposure to heat is prolonged, it can affect sperm production processes, causing the body to produce fewer sperm, many of which may be abnormally shaped.
Researchers have found that the reason why a man’s testicles rests outside the body in the scrotum rather than in the abdomen like the ovaries is because the ideal temperature for sperm production is three to four degrees below normal body temperature. Any warmer will affect sperm count, reducing it by about 40 percent per one-degree rise.
As far as damage from factors, such as saunas, hot tubs and heating blankets, it is believed that sperm generally recover quickly from heat exposure. However, studies have shown that the production of sperm is a process requiring approximately three months, which suggests that even when a factor that may be harmful to production is taken away, a normal sperm count may not occur again for at least three months. Thus the best way for a man to protect his fertility is to avoid high-heat situations whenever possible.