In the past 50 years, is the greatest debate about male reproductive health decline in semen quality on a global scale. Denmark scholar Dr niersi·shabake has a comprehensive analysis of the 1938-1990 years, nearly 15,000 people in 21 countries in the world of semen quality report, found that males has reduced the number of sperm in the 50 years more than 40%. Among them, semen volume reduced 20%, per milliliter of sperm density from 1940 reduced to 113 million per cent in 1990. After that, Europe, America and many Asian countries and regions have published a retrospective comparative data is supported by the vast majority of the decline in semen quality of conclusions.
Chinese scholars also have similar results. National population and family planning Commission of science and Technology Research Institute had published between 1981-1996, from Beijing, Shanghai, Tianjin, 39 counties, 256 copies of documents and, 11,726 sperm analysis data study found that male semen quality in China is falling at an annual rate of 1%, sperm count fell by more than 40%. And, the more industrialised areas, faster decline in sperm quality.
In recent years, in urology and Andrology outpatient clinical practice can see fall in sperm quality causes an increasing number of patients visiting because of male infertility. Due to reasons for the decline in sperm quality, some are congenital or acquired diseases, some some caused by human factors in life. Among them, has been in the study proved the following 10 factors, greatest effect on sperm quality of:
1, food packaging and cosmetics
Germany Research Association recently issued the press release said that the past decades, global reduction in male sperm counts may be related to a chemical called phthalate ester matter.
Phthalate esters are a class of chemicals can be softened. It is widely applied to the vinyl toy, food packaging, flooring, wallpaper, cleaning agents, lubricants, Nail Polish, hair spray, in hundreds of products such as SOAP and shampoo. Studies have shown that phthalate esters may interfere with the endocrine, to reduce sperm count in men, poor exercise capacity, deformity, serious can also lead to testicular cancer, was the cause of male reproductive problems \"blame\".
In cosmetics, Nail Polish had the highest content of phthalic acid esters. It will pass the women\'s respiratory system and skin inside the body, jeopardizing their future fertility of the male reproductive system.
Phthalic acid esters also enter the body through the plastic container packaging of food and water, recyclable milk such as inner coating of food cans, and bottles of mineral water. Studies have shown that higher the fat content in canned food food more vulnerable to pollution, such as pork, anchovies, sardines, etc. Fetal, infant and adolescent children on it are the most sensitive health is most vulnerable to abuse.
In order to reduce the harm of phthalic acid esters on the human body, usually to note it is best not to use styrofoam containers bubble instant noodles, do not use with PVC plastic containers in the microwave heating of food. Right thing to do is to put food on the heated in a heat-resistant glass or ceramic containers.
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2, automobile tail gas
Automobile exhaust gas contains large amounts of harmful substances, such as sulfur dioxide, carbon dioxide, and so on. Human exposure to these substances for a long time, cumulative damage occurs, not only affects reproductive health also may increase the incidence of diseases such as cancer.
Most serious is that of automobile tail gas containing dioxin is a very strong environmental endocrine disrupting chemicals, can make men of morphological changes, reduced sperm count, testis spermatogenic capacity.
3, tobacco, wine
Smoking has long been a enemy of health, effects on sperm is equally clear. Foreign very early study showed that smokers compared to non-smokers, sperm quality of the main indicators are significantly reducing sperm deformity rate of rise, increased number of white cells in the semen. Nicotine in tobacco and polycyclic aromatic hydrocarbon compounds can cause testicular atrophy and sperm morphological change.
Alcohol on the human liver and testis in men have a direct impact. Study finds that testicular atrophy can occur in patients with chronic alcohol intoxication, causing semen quality. Therefore, the male must avoid frequent excessive drinking.
4, estrogen
Estrogen will have a significant impact on male reproductive system, including the effect of androgen levels, raise testicular tissue structural changes caused by testicular cancer, reducing the number of sperm in semen, causing Gynecomastia, lead to endocrine disorders. Men taking drugs containing estrogen and short-term will not significantly impact on the reproductive system, but long contact life articles containing estrogen, you will incur a larger reproductive health hazards. Such as when part of the male skin care free to use women\'s cosmetics. These specifically for women in the development of cosmetics, some containing a certain amount of estrogen, long-term use may cause damage to male reproductive health, causing sexual gland hypofunction.
5, trace elements
Associated with male fertility including trace elements such as zinc, selenium, copper, calcium and magnesium. Zinc is an important element within the reproductive system, zinc deficiency and second features affect adolescent male genital development, reducing the ability of sperm, weaken the body\'s immune function, men likely to suffer from prostatitis, epididymitis, and other infectious diseases. Lack of selenium will make peroxidase concentrations increase, causing damage to the testes of the male reproductive system and. Therefore, the male usually should eat foods containing higher zinc, selenium, such as milk, corn, black rice, black beans, and so on.
6, temperature
Damage to the testes produce high temperature, but under high temperature and this temperature exposure for many long, will have an impact on testis, now in academia are still disputed. In animal experiments, male
Placed under the 38.5 ° c after 55 minutes, their fertility will decline. In real life, men should avoid staying in high temperature environments for too long, such as sauna and hot baths.7, drugs
Cancer, hormones, antibiotics and other drugs can damage the male Gonadal function, cause a decline in sperm count and quality, or by influencing the endocrine function of gonad, lead to sexual dysfunction. Drug effects on male fertility by type of drug, dosage, treatment, patient age and other factors. General drug dose, the greater, the longer the course, patient age, and the smaller, more serious damage to the reproductive function, the time required to restore fertility more.
At present, the spread of sexual health products in the community, some contain sex hormones or similar substances, may affect the normal testis spermatogenesis, unmarried not finishing choices should be cautious.
8, noise
With the development of modern, urban noise effects on health of the more prominent. Noise is pollution. In recent years, some experts raised the \"environmental hormone\" theory, that exists in the environment that affect the human body like a hormone endocrine function of chemical substances, noise is one of them. It causes the human endocrine disorder, causing semen and sperm abnormalities. Noise pollution for a long time can cause male infertility; women, causes abortion and fetal abnormalities.
9, radiation
Effects of radiation on human health has determined that there is clear. Large doses of radiation can cause changes in testicular tissue structure, increase sperm deformity rate, reduced sperm count, sperm density and other important indicators. However, small doses of radiation will cause infertility, there is no exact results. We daily use of electronic devices, such as mobile phones, computers will cause infertility, there is great controversy in the field. Therefore, the male usually should minimize exposure to the radiation source, but without excessive stress.
10, drugs
There are many people who take drugs in China, some drugs, such as cannabis, cocaine, have an impact on the quality of semen. Cannabis can make lower Androgen levels in the blood, declining sperm density, lead to Gynecomastia; cocaine would bring down the sperm density.
Major issues of sperm quality relationships with humans to survive and reproduce. For these factors, we should take on high alert, prompt attention and avoid the other hand, also to call on all forces to the whole society to improve the environment in which we live. Otherwise, it will be like United States scholar Xiao·keerboen in the book our stolen future, as stated in: infertility could become a widespread epidemic, man may become completely lost in the future fertility sth
