Men seem to be accustomed to careless life - clothes are sloppy, and underwear is worn by a casual pull. In this regard, Dr. Shafiq of Cairo University medical school in Egypt pointed out that men had better not wear pure polyester (chemical fiber) underwear, because it may inhibit spermatogenesis and affect male sexual function.

Shafiq has been working on the physiology of male infertility for 20 years. A few days ago, he found from the study of the influence of textile type on spermatogenesis, pregnancy and sexual activity, the results showed that the temperature of testis and the level of plasma hormone were significantly different in men wearing underwear. For example, men who wear chemical underwear tend to reduce sperm count, while those who wear cotton underwear for a long time have no change in semen quality.

More convincing data is that after 4 to 8 months of taking off chemical underwear, male sperm quality will return to normal. With these data, Shafiq believes that chemical underwear will temporarily inhibit sperm production. "Although at present, there is no special research in this country, but from the comfort level and anti static, the chemical fiber underwear is obviously less than the pure cotton underwear."

Professor Zhu Jichuan, director of the Chinese Medical Association's andrology branch, and professor of Department of Urology, Peking University, told Life times Reporter. Wan Pingyu, Dean of the school of science, Beijing University of Chemical Technology, said that the number of chemical underwear will have some influence on sexual function, because it is more likely to cause static electricity. Shafiq's research has proved that chemical fiber briefs are prone to static electricity, thereby affecting sexual functions.

However, pure cotton Underpants It is not suitable for everyone. Although it absorbs sweat, it is not easy to dry. Therefore, men with sweaty constitution are not suitable to wear. In terms of color, it is best to choose light colors. Wan Pingyu said: "dark colored underwear may be dyed, the dye will be somewhat toxic, and too white underwear is overly bleached, and chemical substances and skin contact may be absorbed, so light colored underwear is relatively safe."

He also suggested that after buying underwear, it is best to wash it with clean water first, which can remove some harmful substances. Besides, style It's also important. Compared with the briefs, the flat pants can reduce the shackles and friction on the thigh root, and have good air permeability, which is a good choice. At the same time, choose not to tighten your underwear, otherwise it will also affect the reproductive system.

The above rules of underwear also apply to women. Shafiq believes that the electrostatic effect of chemical underwear may reduce the level of progestin in women and lead to abortion.