Female: 1. Avoid vaccinations (such as hepatitis B vaccine, flu vaccine, etc.) for 3 months before preparing for pregnancy. 2. Avoid exposure to radiation (e.g. chest X-ray, dental film, fluoroscopy, etc.) during the 3 months prior to pregnancy preparation. 3. During the preparation for pregnancy, strengthen nutrition, pay attention to rest, and avoid high fever over 38.5 degrees. 4. All women planning to get pregnant should start taking pregnancy vitamins, such as small dose folic acid (0.4 mg/tablet, 1 tablet/day), within 2-3 months before pregnancy. 5.During the process of pregnancy preparation, medication should be taken with caution and in accordance with medical advice. In the process of pregnancy preparation, try to use less or no overly scented cosmetics (e.g. perfume, etc.) and avoid contact with chemicals (e.g. hair dyeing, perming, etc.). 7. Psychological preparation: Be fully prepared psychologically, maintain a good and relaxed state of mind, and put yourself in a calm mood. Male side: 1. Avoid staying up late. Staying up late has a great impact on the quality of semen. It is recommended to rest before 22:00. 2. Avoid contact with high temperature environment, do not take sauna and very hot bath. Temperatures higher than 38 degrees can cause a decrease in sperm quality (recent fever can cause a decrease in sperm quality). 3. Please do not smoke and drink alcohol. Smoking and drinking alcohol have a great impact on sperm quality. 4, diet: a balanced diet, eat more fresh vegetables and fruits, tomatoes, garlic, lean meat, eggs, etc., to improve the quality of semen is helpful. 5, keep a happy mood, avoid excessive mental tension, anxiety. 6, do not be sedentary, moderate exercise. 7, do not wear tight underwear. 8.Avoid contact with harmful rays and harmful substances. 9.If you have had or suspected of having genital herpes and other diseases of the reproductive system before, inform your doctor during the preconception examination.