Why is the quality of sperm in modern men poor?
It is understood that in the 1970s, the WHO standard was that the sperm volume in semen was more than 60 million ml/ml, and it was normal in the 1980s. It was reduced to 40 million/ml in the 1980s. Today, the World Health Organization has already adopted this standard. Dropped to 20 million/ml, the quality of sperm is also worse than before, abnormal sperm such as lack of power and morphological malformation sperm increased. What's more, oligozoospermia and azoospermia have also increased year by year. What is behind the scenes causing the decline of sperm quality?
Electronic radiation and sedentary. The former will directly damage the testicles, while the latter will increase the temperature of the testicles and affect the quality of the sperm. Researchers at the Harvard School of Public Health (HSPH) found that men who watch television for more than 20 hours a week have 44% fewer sperm than those who watch almost no television. Men who performed moderate to strenuous exercise for 15 hours or more per week had a 73% higher sperm count than their weekly workouts of less than 5 hours.
high pressure. Researchers at Columbia University School of Public Health have found that psychological stress affects the quality of sperm and semen, including reduced sperm concentration in semen, altered sperm appearance, and decreased fertility. Dr. Pam Factor-Litvak, assistant professor of epidemiology at the School of Public Health and the study's lead author, said: "For men with higher pressure, the concentration of sperm in semen is usually low, sperm It is also more prone to malformations and poorer vitality.
Smoking and drinking did not affect? The researchers found that factors such as smoking, drinking, and excessive body weight had little effect on male fertility. For example, the proportion of spermatozoa in men who smoke more than 20 cigarettes per day and never smoke is almost equal. There is also no connection between drinking and male fertility. According to the study's author, Andrew Povey of the University of Manchester, everyone is calling for the elimination of smoking, moderate drinking, staying away from drugs and maintaining proper weight, which is also advice for men's health. However, this study shows that even if men improve their living habits into such a healthy way, they will hardly help improve infertility.
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