It’s that time of year again, and on Valentine’s Day, February 14, when young lovers are in love and discussing their plans to have a “dragon baby,” we might as well talk about eugenics. When it comes to eugenics, young mothers-to-be often ask: “We are ready to get pregnant, what do we need to pay attention to in terms of diet?” The general rule is: eat “fresh” foods that are “in season” and avoid the stimulation of alcohol and tobacco. With the improvement of living standards in our society, when we talk about nutrition, we tend to worry less about nutritional deficiencies and more about whether the intake of nutrients is balanced, but too much intake of specific nutrients is also a kind of malnutrition. Not being picky about what you eat and consuming a variety of foods can ensure a balanced intake of nutrients. For example, most young women now know the importance of folic acid in preventing neural tube abnormalities, but what they may not realize is that a wide variety of foods, such as cereals, fresh fruits, vegetables, eggs, and animal offal, are rich in folic acid, and you can get enough folic acid with a balanced diet. Now we can eat all kinds of anti-seasonal fruits and vegetables, but if you are preparing to have a baby, it is still recommended to try to choose the seasonal fruits and vegetables. This is because fruits and vegetables that are out of season often require a series of measures to promote their growth, including the application of fertilizers, plant hormones and other techniques, and the effect of these measures on early embryonic development is not yet clear. Some fruits and vegetables are marketed counter-seasonally after relying on long-term storage, and the storage process may also involve some chemicals used to preserve freshness, which is also something to beware of. The Chinese have a habit of eating pickled and smoked foods, but young couples preparing to have a baby should avoid them and try to eat fresh foods. Pickled foods are often rich in nitrites, excessive intake not only affects the oxygen-carrying blood, but also teratogenic and carcinogenic effects. Cigarettes contain nicotine, which can affect the secretion of sex hormones, kill sperm, reduce male sexual function, affect the development of germ cells and embryos, resulting in fetal baby malformations. Alcohol directly affects the quality of sperm and eggs, and can also cause malformed fetuses by affecting the absorption of folic acid. In ancient times, Tao Yuanming was fond of drinking alcohol and he gave birth to five sons, all of whom were mentally retarded. Finally, Tao Yuanming had no choice but to write a poem: “…… Although there are five boys, always bad with paper and pencil. A Shu has two eight, lazy solid match. A Xuan Xing Zhixue, but does not love the art of writing. The year of Yongduan 13, do not know six and seven. In addition to the diet, young couples may also need to make some adjustments to their lifestyle if they want to have a healthy and smart baby. The first thing is to exercise moderately, de-stress yourself and maintain a relaxed mental state. Modern people, especially those living in the metropolis, are often in a sub-healthy state due to lack of exercise, fierce competition and high stress. The impact of poor health on fertility is undeniable, and the impact of psychological factors on fertility is just as important. Some studies have shown that excessive stress, which causes emotional depression and even depression, can inhibit fertility, more so in women. In order to be in a good frame of mind for the arrival of a baby, it is essential to get enough sleep, exercise actively and reduce stress moderately. Secondly, you should start paying attention to the safety of your surroundings. Our living and working environment is not satisfactory, there may be some high-risk factors such as microorganisms, chemical pollution, radioactive substances, etc. At this time, we should consciously identify and avoid, for example, avoid staying in crowded and mixed places to avoid infection with disease-causing microorganisms; pets kept at home such as cats and dogs should be boarded to friends and relatives as far as possible before pregnancy; avoid contact with various chemicals such as insecticides, volatile solvents, etc., and when you encounter the need to Avoid contact with chemicals such as insecticides, volatile solvents, etc., and consult your doctor when you need to take medication to find out if it has any effect on your pregnancy; pay attention to avoiding and protecting yourself in environments where you may be exposed to radiation, etc. In addition to paying attention to your own diet, exercise and psychological adjustment, you can also go to the hospital for preconception checkups if necessary. Pre-conception check-ups can help to understand the physical condition of both spouses, so that problems can be detected and solved in time, and the body can be adjusted to the best condition for conceiving the next generation.