During the ideal childbearing age, to choose the most favorable time for eugenics to conceive, attention should be paid to the following aspects: 1. Parents’ health is the basis of children’s health, so children should be conceived when the couple are both in good health. If one of the couple suffers from acute infectious diseases, tuberculosis, febrile diseases, or if the wife suffers from serious diseases of the heart, liver, lungs, kidneys and other organs, they should not conceive. 2. In order to avoid the influence of certain unfavorable factors on conception, a couple should not conceive while either of them is taking medication for a certain disease. Oral contraceptives should be discontinued 3 to 6 months before conception is considered. Alcohol consumption is not suitable for conception. The toxic effect of alcohol on reproductive cells or fertilized eggs is very great. Couples who have intercourse and conceive after drinking a lot of alcohol will have children who are underweight, stunted, mentally retarded, and have deformed faces. 3. Create a favorable environment for conception. The physical and psychological state of the couple has a direct effect on conception. A quiet, harmonious and comfortable environment is good for one’s physical and mental health, as well as for the development of reproductive cells and fertilized eggs. Therefore, should be in a pleasant climate, couples full of spirit, happy mood, should be avoided in the late fall, early winter season conception. Because of the changeable temperature at this time, the mother is prone to colds and illnesses, and the rate of malformation of babies is higher than that of other seasons. 4. 4. In the month or so before the planned conception, both husband and wife should strengthen their nutrition and eat more high-protein and vitamin-rich food so that the germ cells can develop well. 5. Sexual intercourse in the first 14 days of the menstrual cycle has a high success rate of conception, with a success rate of more than 92%. If you have intercourse after the 17th day of the menstrual cycle, the rate of miscarriage increases. 6. 6. Honeymoon conception is not conducive to eugenics. Young men and women always have to be busy before marriage, often very fatigue, so that both men and women in the energy and physical exertion is very large, the newlyweds due to drinking and smoking, the quality of these reproductive cells will have a greater impact on the generation of. 7. honeymoon travel, do not easily pregnant. Because in the journey often early morning and late night, irregular life, food and accommodation is not guaranteed, rest and sleep insufficient, poor resistance, easy to catch a cold, on the development of the embryo is not favorable.