With the full implementation of the “separate two-child” policy and the recent hype about the “full two-child” policy, more and more families are considering the issue of having a second child. The number of people coming to the male infertility clinic to have a second child has been increasing, and this has certainly cast a shadow over many families who have raised hopes of having another child. Theoretically, these men who have already given birth are different from primary male infertility, their own fertility should not be too much of a problem, but after giving birth, the quality of sperm may decline with age and poor lifestyle, which affects fertility. For men who are planning to have a second child, what should they do to prepare for pregnancy in order to increase the probability of conception? There are numerous articles on fertility testing and medication, so I won’t go over them one by one here. This chapter focuses on lifestyle and dietary modifications that are beneficial to sperm quality. Dietary modifications The first thing to do is to avoid smoking, alcohol, carbonated beverages, barbecue, coffee and other undesirable dietary practices. In addition, you can selectively add more food rich in the following elements: 1, protein: adequate, high-quality protein can improve the quantity and quality of sperm, high-quality protein, including animal and vegetable protein, both containing fatty acids necessary for the human body, they can only be obtained from food through the body’s own synthesis, but we must pay attention to protein, although good, can not be consumed in excess, to maintain a balanced nutrition, to maintain a good nutritional status. Maintain a good nutritional status; 2, minerals and micronutrients: minerals and micronutrients in the body are important for male fertility, for example, zinc, manganese, selenium and other elements. If the body but zinc will lead to a decline in male gonadal function, testicles become smaller, it is difficult to get hard, sperm production decreased, lack of selenium will make sperm mobility decreased, lack of manganese will cause male sperm maturation disorders, dull sperm amount decreased; 3, magnesium food: magnesium helps regulate human heart activity, lower blood pressure, prevent heart disease, improve the fertility of men. Food containing more magnesium are soybeans, baked potatoes, walnuts, oatmeal, macaroni, leafy vegetables and seafood, it is recommended that men can try. Most of the men working in big cities, there is generally too much pressure, stay up late and work overtime, irregular work and rest and sedentary phenomenon, which is really unfavorable for men who want to have children, to change the status quo should have the persistence and perseverance to adhere to it. First of all, to ensure adequate sleep, poor sleep, when you can’t sleep, let yourself lie down, close your eyes and relax. Often to their cell phones and computers “vacation”, try to control themselves not to look down to the phone. The computer can be set to standby hibernation, about 2 hours on the Internet should be rested, to the outdoors or open space to relax the body. If you get up early in the morning, it is best to take time to take a nap, usually about 30 minutes, to the time to force up, get up and go out in order to wake up. For metropolitan white-collar workers, staying up late and being sedentary are two common life factors that affect sperm quality and should be avoided as much as possible. The actual fact is that you can find a lot of people who are not able to get the best out of the actual body, but not all forms of exercise are good for reproductive function. 1, daily walking, eating and moving in balance: Due to differences in personal health, physical fitness, ability and other conditions, people with little daily activity or poor physical fitness can start with a target of 1,000 steps per day and end up with an amount of exercise greater than 10,000 steps per day, which can yield more health-promoting benefits under the premise of moderation. Therefore, the principle of choosing the amount of personal exercise is: moving is beneficial, more movement is better; 2, step by step, feel strong: when you start forging, choose to feel easy or a little hard intensity, give yourself enough time to adapt to changes in the amount of activity, and then gradually increase the intensity and time of activity. Medium-intensity activities are characterized by: your heartbeat and breathing will accelerate, feel hard but not strenuous; may sweat, but do not feel short of breath uncomfortable; can speak continuously with the rhythm of breathing, but can not sing. Therefore, to achieve “can say can not sing”, is a medium-intensity exercise; 3, regular exercise, expensive in persistence: If your daily exercise is relatively small, then, it is recommended that you should be more than 5 days of physical exercise per week, 30 minutes each time, the intensity of the recommended above “can say can not sing “. This will roughly achieve the goal of 6,000 steps per day. Get into the habit of exercising every day, you will find that exercise is no longer a burden.