First of all, it is important to avoid malnutrition or overnutrition. Long-term malnutrition may cause changes in the synthesis and secretion of hormones and feedback regulation in the body, affecting testicular growth and sperm production, thus affecting fertility. Overnutrition leads to obesity, which affects the development of the penis and causes low testosterone levels in the blood and increased estrogen levels, which affects sperm production in the testes and abnormal semen quality, thus affecting fertility. Those who are overweight, must pay attention to exercise and weight loss! Secondly, bad habits have a greater impact on fertility and need to be noted: 1. It is forbidden to eat foods that affect fertility: cottonseed oil, excessive abuse of food additives, coloring agents, preservatives, large amounts of pesticide residues in agricultural products and other toxic and harmful substances. When it is necessary to contact these toxic substances, be sure to take the necessary protective measures. There are also estrogen-like substances, including pesticides, herbicides, plasticizers, etc., which can cause the accumulation of estrogen-like substances in the body, affecting sexual and reproductive function. 2, quit smoking and drinking, do not abuse drugs that affect testicular development and sperm production: anti-cancer drugs, hormonal drugs, antibiotics and many other drugs can damage male reproductive function and can directly cause a decrease in the quantity and quality of sperm, or affect the secretion of sex hormones leading to sexual dysfunction and even infertility. The maturation time for sperm to occur is about 3 months, so the average patient. It is not advisable to let the wife get pregnant during the period of medication and for nearly 3 months after stopping the medication. Nowadays, the more prolific sexual health products in society may contain sex hormones or similar ingredients that may affect the normal reproductive function of the testicles, unmarried and infertile choice to be extra worried, it is best not to choose blindly on their own. 3, to prevent testicular trauma. 4, to prevent radiation: radiation at work such as hospital radiology, radiotherapy, nuclear medicine, nuclear power stations, large substations, high-temperature working environments, etc., staff should take protective measures to protect the testicles; radiation pollution in the living environment also exists from time to time, such as home furnishings using marble, granite and other materials, may contain excessive rays, which can cause the number of sperm, reduced vitality, affecting fertility. 5, the right amount of certain trace elements: appropriate supplementation of vitamin C and E can be antioxidant, against oxygen free radicals, conducive to improving sperm vitality and morphology. Zinc deficiency can affect the development of male reproductive organs and sex characteristics during puberty, affect the vitality of sperm and reduce the ability to excrete lead, so proper supplementation of zinc can maintain and improve fertility, foods with high zinc content mainly include milk, corn, oysters clams and other seafood. Selenium deficiency can weaken the antioxidant function in the body and increase the damage to the male reproductive system and testicles, therefore, proper supplementation of selenium-rich foods black rice, black beans and other black foods is beneficial.