The preparation for conception should begin 3 months before the moment the sperm and egg unite. The best age to conceive is not older than 35 years old. The best age for a woman to conceive is between 24 and 29 years old, preferably not older than 35. The older the eggs are, the longer the eggs are stored in the ovaries, and the more the chromosomes of some eggs can “age” and decline; moreover, with age, the function of the ovaries gradually declines, and the more the eggs in the ovaries are exposed to infections, radiation, and harmful substances in the infected environment. In addition, as we age, ovarian function gradually declines and the eggs in the ovaries have more opportunities to receive infections, radiation, and harmful substances from the infected environment, increasing the probability of chromosomal mutations and resulting in more abnormal children. The optimal age for male fertility is 29-34 years. Male germ cells are produced in large numbers and rapidly, and only one of them is eventually united with the egg cell, which is less affected by age. However, it has also been shown that as men age, the number of abnormal sperm increases. In order to have a good maintenance before the eugenics 1, eat Women should eat a lot of “hematopoietic material” of high-quality protein, the necessary trace elements iron, copper, etc., vitamin B12 and folic acid and other nutritious food. Such as animal liver, eggs, blood, fruit, black sesame, peanuts and fresh vegetables, soy products, black fungus, fish, red dates, kidneys, shrimp, etc.. First, develop good eating habits before pregnancy. Women should start to adjust their diet before they are ready to get pregnant, pay attention to the reasonable combination of food, the variety of food should be diversified, not partial food or taboo. Secondly, pay attention to a reasonable diet before pregnancy. Women who are preparing to have children after marriage should pay special attention to the intake of protein, minerals and vitamins. Pre-conception couples can selectively and scientifically arrange three meals a day according to their family situation and different seasons to prevent anemia before pregnancy. A lot of medical data confirm that malnutrition in women before pregnancy is more likely to lead to serious anemia after pregnancy. If a pregnant woman is anemic, her fetus is often malnourished, which may result in low birth weight, premature birth, or even stillbirth, which is not conducive to eugenics. Therefore, couples preparing for childbirth must pay attention to pre-conception nutrition, the couple after a buffer period of nourishing the essence of the body, the body of both stored sufficient nutrition, physical health, energy, in order to lay a solid foundation for eugenics. In addition, some women are obese before pregnancy and worry that they will be out of shape after pregnancy, thus limiting their food intake, which will cause body fat depletion and increase ketone bodies, which is not good for the healthy development of the fetus. Therefore, you should not restrict eating and blindly lose weight during pregnancy to avoid affecting eugenics. Finally, pay attention to the choice of food and avoid eating contaminated food. Some processed foods such as pickled and waxy products and canned foods are not as nutritious as their fresh counterparts and do not pay attention to hygiene. When consuming vegetables, you should pay attention to washing them well, and fruits should be peeled before consumption. On weekdays, try to drink plain water, and avoid drinking all kinds of coffee, drinks, juice and other beverages. In addition, family cookware as far as possible to use iron or stainless steel products, avoid using aluminum products and colored pond porcelain products, to prevent the lead element to produce damage to human cells. 2.Mind and body Happy mood, cheerful personality, not only can promote the body’s immunity (immunity products, immunity information), but also enhance the body’s bone marrow hematopoietic function up, making the skin rosy, lustrous face. 3, sleep to ensure that there is sufficient sleep and abundant energy and physical strength, and to do sometimes, entertainment, work and rest combination. The mother-to-be should learn to live scientifically and develop a modern scientific and healthy lifestyle, not to stay up late, not to eat partially, not to eat snacks, to stop smoking and limit alcohol, not to have intercourse during the menstrual period or puerperium and other special physiological stages, etc. 4.Exercise You should often participate in physical exercise, such as aerobics, walking, ball games, swimming, running, dancing, etc., which can enhance physical strength and hematopoietic function. In addition, if necessary, anemic people should take blood nourishing medicinal food.