Pre-pregnancy preparation: You need to be fully prepared before getting pregnant to try to increase the success rate of pregnancy. First, a physical examination is required to ensure good health. If there are chronic diseases, they should be treated in time. Secondly, you must adjust your mentality, maintain a happy mood, and avoid mental stress and excessive fatigue. Finally, we must pay attention to nutritional intake and increase the intake of folic acid, calcium, iron and other nutrients to allow the embryo to form early and maintain healthy development.