Boxers or briefs?
It is known that testicular temperature will have adverse effects on sperm. Tighter underpants may cause testicular temperature to rise. Wearing tight underpants may cause testicles close to skin. However, research shows that different types of underpants have different effects on testicular function.
The latest study is one of the largest to investigate the relationship between underwear types and sperm quality. Between 2000 and 2017, researchers tested 656 men, mainly in their 30s, who had gone to the Massachusetts General Hospital with their wives for infertility treatment.
The men provided semen and blood samples and answered questions about the type of underpants they wore most often. Overall, 53% of men said they usually wear boxers. The results showed that the average sperm concentration of men in boxers and briefs was "normal," with at least 15 million sperm per milliliter of semen.
However, the sperm concentration of men wearing boxers is 25% higher than that of men wearing boxers. On average, in a single ejaculation, the number of swimming sperm in the sperm of men wearing boxers is 33% higher than that of men wearing boxers. Even after considering the factors affecting the sperm health, the research results are still valid. The factors affecting the sperm health include obesity and sports activities Frequent hot baths and smoking.
What's more, the researchers found that men in tights had higher levels of a hormone called follicle stimulating hormone (FSH), which stimulates sperm formation.
The findings suggest that in men wearing tight underwear, a decrease in sperm count may send a signal to the brain to increase FSH index, thus making up for a decrease in sperm production, but more research is needed to confirm this hypothesis.