What will affect sperm cell growth? What do sperm fear most in the process of human-making

The quantity and quality of sperm are quietly affecting the birth rate and quality of the population. In the past 50 years, the number of men's sperm has decreased by almost half on average. After the 1990s, the proportion soared to 15%. What was worse was the decline of sperm quality. The proportion of abnormal and inferior sperm increased, and the vitality, penetration and pregnancy rate were declining. In the 1970s, the proportion of male and female infertility was 3:7, less than half of that of female; Ten years ago, the proportion rose to 1:1, and male infertility and female infertility were equally serious.

Sperm is the final product of the development of male germ cell line. In the process of spermatogenesis, formation and degeneration, due to the loss of deoxyribonucleic acid (DNA) repair enzyme, the function of DNA damage and repair system is lost. It can no longer repair more than 90% of the loss of genetic material on its own, like somatic cells and egg cells. Of all the cells in the human body, only sperm has this; Weakness, so it appears very fragile.

Compared with other kinds of cells, sperm; There are many natural enemies, and the sperm itself is weak in its ability to resist, and it is sensitive to a variety of toxic substances. Male spermatogenic cells are always in a state of rapid division from the middle and late stages of the embryo. In the process of rapid spermatogenesis, the harmful effects caused by various harmful factors are significantly increased due to accumulation and accumulation. Research data has confirmed that compared with X chromosome, the gene carried by Y chromosome is more prone to mutation.

The rise and fall of the animal kingdom has provided us with a mirror: the degradation of higher animals and endangered animals begins with the decline of sperm quality. For men of childbearing age, we should know these things about sperm; Weakness is necessary.

Pesticides and pesticides

Because of the widespread application of such harmful substances in the planting industry, it not only harms farmers, but also affects urban young people of childbearing age, who will suffer through direct contact or eating vegetables, fruits and other food sprayed with pesticides and pesticides. The harm of pesticides and pesticides lies in reducing the activity of enzymes in the testis, reducing the energy supply during spermatogenesis, changing the seminiferous tubules and spermatogonia that produce sperm, increasing the number of abnormal sperm, and leading to the formation of abnormal babies.

waste gas

The number of motor vehicles such as automobiles and motorcycles has increased and entered the family. The vehicles emit a large amount of exhaust gas containing toxic substances during the driving process, which can reduce the male sexual function and distort sperm. As for the massive emission of industrial waste gas, it has increased the concentration of pollutants in the atmosphere, resulting in the injury of men's sexual organs.

an electric appliance

Household appliances, computers, microwave ovens, etc. can cause contact persons to suffer from electromagnetic waves and fluorescent screen rays, interfere with cell division, cause atrophy of seminiferous tubule epithelium, distortion of spermatogenic cells, and cause azogenesis or abnormal sperm production, resulting in infertility or teratosis.

smoke

Professor Wang Junnan, director of the Center for Environment and Occupational Health of the National University of Singapore, and his colleagues found that the majority of men suffering from infertility are smokers. Besides the fact that the number of sperm of these smokers is about 15% less than that of normal men, the number of incomplete sperm is also much higher than that of normal men. Nicotine and chromium in cigarettes are ingested into the body during smoking. After oxidation, they produce highly active free radicals, which destroy the genetic material of male sperm cells, deoxyribonucleic acid, and cause genetic information errors, thus giving birth to deformed fetuses.

alcohol

Like nicotine, alcohol is also the killer of sperm damage, causing sperm head and tail deformity and decreased vitality.

high temperature

The temperature suitable for sperm development is about 34 ℃, and high temperature has adverse effects on sperm development. According to the report of Japanese experts, the sperm quality of drivers has improved significantly since the car was equipped with air conditioner, which is an example. Therefore, high temperature operation and hot water bath should be treated with caution.

Lack of nutrition

The production and development of sperm cannot be separated from nutrition, such as arginine supplying nitrogen to sperm, vitamin B12 and vitamin C promoting sperm production, and protecting sperm from harmful factors. We should expand the variety of food and avoid single food and unbalanced nutrition.

medicine

Many drugs can damage sperm, such as antihypertensive drugs, diuretics, antibacterial drugs and drugs for treating heart disease and gastric ulcer.

STD

Spirochetes, mycoplasma, chlamydia and other germs invade male testicles, seminal vesicles, prostate and other reproductive organs, causing inflammation, causing sperm to lose its normal shape, reduce activity and survival rate.

Drug

Men taking drugs can reduce the level of testosterone in the blood, weaken the reproductive ability, and ejaculate impotence, resulting in infertility. For example, the sexual desire inhibition of heroin addicts reached 100%, and that of methadone addicts reached 96.5%.