The best time for preconception checkups depends on individual circumstances, but usually 3-6 months before conception is appropriate to allow sufficient time for physical conditioning after the checkup. Pre-conception check-ups are different from regular medical check-ups, and are mainly done for the reproductive system and genetic factors of both spouses. A healthy fetus must be the result of the union of a healthy sperm and egg, so men need to be tested as well. If problems are found, they can be solved as soon as possible to prevent abnormalities after pregnancy, which can lead to a passive treatment. If you have high blood sugar or high blood pressure, you will need medication to regulate your blood sugar and blood pressure to within a certain range before you can get pregnant. If vaccination is required after the examination, it will also take some time to produce antibodies. As mentioned above, it is better to have preconception checkups 3-6 months before pregnancy preparation. In addition, women need to take oral folic acid 3 months before pregnancy to prevent fetal neural tube abnormalities, and they need to enhance nutrition, maintain a regular lifestyle, and stop smoking and drinking. It is also necessary to maintain a regular lifestyle, stop smoking and drinking, and minimize visits to public places to avoid upper respiratory tract infections and other infectious diseases.