First of all, we have to be clear about what is fertility? Generally speaking, there are two basic points for men, namely semen quality and whether the sexual function is normal. If male friends can pay attention to the following points in their daily life, it will be of great benefit to protect their reproductive capacity. (1) Adopt good living habits. Do not smoke, do not abuse alcohol, diet should be balanced and comprehensive, no matter what food to eat to “grasp the degree”. Alcohol is a gonadal toxin, excessive or long-term drinking, can cause gonadal toxicity. Men can experience a decrease in serum testosterone, a decrease in libido, low sperm motility, elevated spermatozoa and deformed sperm, and sexual dysfunction. According to research, 71% to 80% of men who abuse alcohol either have decreased libido or sexual impotence, or both. Smoking has an effect on every aspect of sperm production and maturation. Some scholars have selected 41 smokers and non-smokers to conduct a comparative study with approximately the same sperm concentration. The results found that the proportion of malformed sperm in the semen of smokers was much higher than that of non-smokers. It has also been shown that smokers who smoked more than 20 cigarettes a day had significantly higher rates of sperm deformities than those who smoked less than 20 cigarettes a day. And the longer the smoking time, the more deformed sperm, sperm density also began to decline, sperm mobility is also significantly reduced. The reason for this may be related to the cadmium and nicotine contained in tobacco. Nicotine can affect testicular germ cells, with the effect of inhibiting the secretion of sex hormones and killing sperm. Cadmium is a metal pollutant. Cadmium that enters the body is more likely to accumulate on testicular tissue, and excess cadmium can lead to pathological damage to testicular tissue. To develop good dietary habits, do not be partial to food, do not often eat fast food, as far as possible, do not drink or drink less coffee drinks. Reduce sugar and fat, and avoid foods containing preservatives and coloring agents. Fruits and vegetables should be washed again and again before consumption, and do not use Styrofoam lunch boxes to contain hot meals or heated food. (2) Do not wear tight underwear, do not sauna, do not sit in the bath, do not often sit on the soft sofa, in order to ensure the appropriate temperature of testicular spermatogenesis. “Don’t dye your hair, don’t h oil” to prevent certain chemicals from damaging the reproductive function. Do not use computers and other electrical products for a long time, and pay attention to the protection of ionization and ray radiation. (3) It is best not to use skin care products, especially female cosmetics. Because some cosmetics have a certain amount of estrogen, long-term use will cause male gonadal axis dysfunction, affecting testicular spermatogenic function. (4) Prevent indoor decoration pollution. The most common toxic substances in indoor decoration mainly include formaldehyde, radon gas, benzene, xylene and certain radioactive substances, etc., which have a great impact on the quality of male spermatozoa and embryonic development. Especially radon gas, which mainly exists in some building materials such as granite slabs, concrete or cinder blocks, is a colorless and tasteless gas produced by the decay of elements such as uranium and thorium. So for the newly built and just renovated house, must be through there are relevant departments of the test, up to standard before moving in, no matter winter and summer should pay attention to open the windows to ventilate. (5) men engaged in certain occupations to enhance the protection of reproductive function awareness. Certain occupations such as painting, welding, leather manufacturing, some chemical enterprises, chefs, gasoline workers, etc., because of these occupations on the male reproductive function has a certain impact, it is recommended that unmarried or infertile, to do a good job of protection; on the original reproductive capacity of the men who have declined, it is best to be able to replace the work. Avoid the occurrence of the situation of “ticket” and “child”. (6) Popularize sexual knowledge and advocate sexual civilization. To strengthen the study of sex knowledge and reproductive knowledge, to understand the male physiological characteristics and health care knowledge. (7) Cleanliness, prevention of sexually transmitted diseases. Many sexually transmitted diseases such as gonorrhea, non-gonococcal urethritis, genital herpes, etc. have a great impact on male reproductive ability, so male friends must be able to withstand the temptation to be clean and prevent sexually transmitted diseases. It is best for male friends not to take a bath in a large pool, especially for those who are circumcised. (8) regulate the mood, strengthen the exercise. A good state of mind, a pleasant mood, and a strong physique can improve the body’s immune system, which can effectively prevent a variety of bacterial and viral infections, such as testicular epididymitis, viral mumps orchitis, etc.; studies have confirmed that obesity can lead to a decline in the quality of spermatozoa, and obesity can be avoided through exercise (9) Regular medical checkups Particularly for reproductive system checkups, it is suggested that it is best to do so 1 time a year. If you find abnormal changes in the testicles, such as enlargement, hardening, unevenness, pain, etc., you must see a doctor in time. (10) Pay attention to safety and avoid straddle injuries. If there is any straddle injury, no matter how minor or serious, you should go to the hospital in time to clarify the degree of damage to the reproductive function.