Like planting trees, flowers and crops, we need to apply fertilizer and plow the ground before planting, both couples need to adjust their physiological and psychological state before pregnancy to welcome the “seed” and work hard to conceive a qualified and good fetus. Prepare for pregnancy in advance is indispensable for eugenics, conception, and laying the foundation for good genetics. In order to have a healthy and smart child, it is important to take care of the genetic eugenics. Both parties need to know the following information before pregnancy: i. Know the family history of both parties The parents-to-be should not forget to visit the doctor and do some necessary pre-conception tests. In addition to mental illnesses and genetic diseases, focus on finding out if anyone in your family has suffered from genetic or chromosomal variation-related diseases, such as Down syndrome, mental defects, congenital birth defects, etc. If the male partner feels that he may have problems with his testicular development, he must first ask his parents if he had mumps as a child, if he has had cryptorchidism, testicular trauma and surgery, painful swollen testicles, syringomyelia, hiatal hernia, urethral discharge, etc., provide this information to the doctor and consult carefully. If the female partner has menstruation or other problems, she should also find out about her mother’s and sister’s menstruation before consulting the doctor. Second, adjust the lifestyle of both sides 1, to stop smoking and alcohol, healthy diet and regular rest. Different foods contain different nutrients and vary in content. Don’t be partial to food and develop good dietary habits. 2, if you are overweight (thin or fat), then the same will make the chances of pregnancy greatly reduced. Therefore, weight problems also need to be adjusted from this stage in a planned manner. 3. If you can combine outdoor exercise, even jogging and walking every day will help to improve your physique. Exercise can not require intensity, but should focus on persistence. 4. During the preparation for conception, avoid exposure to chemical substances and ultra-strong electromagnetic waves in life and work. If you have a pet at home, take it to the hospital for a physical examination and test for toxoplasmosis antibodies, if it is positive, you can still leave it at home. Just be aware that from now on you will take your pet to the hospital at least once a month for a checkup to ensure safety.