The Institute of Science and Technology of China’s Population and Family Planning Commission, analyzed data from 39 cities and counties in Beijing, Shanghai, etc. The results show that the quality of semen of Chinese men is also declining at a rate of 1% per year, with the number of sperm dropping by more than 40%. The first thing to be affected by the decline in semen quality is male fertility. For a long time, people used to think that “childbirth is a woman’s business”, but according to the World Health Organization (WHO) survey, couples infertility, purely male causes accounted for 30%, while men and women together accounted for 20%, which means that male factors in infertility accounted for half of the mountain. The most important thing to check when you go to the hospital is the semen analysis, such as the detection of less sperm (total sperm count less than 20 million/ml), or weak sperm (sperm viability <50%), or deformed sperm (normal form of sperm <14%), in this case, fertility may be lower, but it does not necessarily make you infertile. In fact, the real value of semen analysis is only to facilitate the physician to distinguish between three states: low fertility, uncertain fertility and good fertility. "Fertility is like planting a field, where the man provides the "seed" and the woman provides the "soil". If both the "seed" and the "soil" are good, growth and development will naturally proceed smoothly. If the "seed" is good, even if the "soil" is poor, the "seed" may also grow and develop well, just like the farmers in the mountains throwing corn seeds in the cracks of the rocks, and in the fall there is a good harvest. Good harvest. The reason for this is that many male infertility patients have been going to the doctor for years and have been to more than ten hospitals, doing all kinds of tests, including chromosomes, sex hormones, ultrasound, CT and so on, but the result is often that a lot of money is spent, but still can not find out where the problem lies. In fact, the World Health Organization (WHO) defines male infertility as male infertility when a couple has been sexually active for more than one year without using any contraception and the female partner is infertile due to male factors. Male infertility is not an independent disease, but the result of one or many diseases and factors. According to the European Society of Reproduction in 2004, 25% of couples of childbearing age cannot conceive within one year, and 50% of infertility is caused by male factors. The causes of male infertility are sexual dysfunction (1.7%), varicocele (12.3%), reproductive tract infections (6.6%), genetic defects (2.1%), endocrine disorders (0.6%), and immunological factors (3.1%), but up to 60% to 75% of patients cannot find a cause, which is called idiopathic male infertility, and they only show oligospermia, weak sperm and/or malformed spermatozoa. and other sperm quality abnormalities. Although, as testing progresses, more and more links that have an impact on fertility will be gradually identified, for the time being, many aspects are still under debate. For example, some studies have concluded that "y-chromosome abnormalities are related to infertility", so patients are very motivated to check, but it is now also found that people who can have normal children can also have abnormal y-chromosomes. Another example is that varicocele, although it is one of the common causes of infertility, varicocele is related to semen abnormalities and testicular volume reduction, but its degree is not necessarily proportional to the abnormal semen quality. The medical community has been studying it for many years, but it is not clear exactly how it relates to reduced male fertility. When opening a national conference on male medicine the experts in attendance have come forward and said, "I myself have varicocele, but my children can all play soy sauce."