Basic knowledge you need to know before getting pregnant. The first three months of pregnancy is the period of preparation for pregnancy. Women who are preparing to become pregnant need to understand some basic knowledge. First of all, you need to understand your reproductive health, including menstrual cycle, ovulation date, etc. Secondly, you need to know which foods and behaviors can affect pregnancy, such as diet, exercise, smoking, etc. In addition, you also need to understand the physical changes that pregnancy may bring, such as breast tenderness, headaches, nausea, etc. It should be noted that everyone’s physical condition is different, so it is recommended to consult a professional doctor during pregnancy preparations.