Level 1: Symptoms of pregnancy at the 20th day. The 20th day of pregnancy is a very important time point. At this time, the embryo has begun to form, and the future baby also begins to develop at this time. For expectant mothers, it is very necessary to understand the symptoms of pregnancy during the 20th day. Generally speaking, expectant mothers who are twenty days pregnant may experience early pregnancy reactions such as breast swelling and pain, deepening of nipple color, nausea and vomiting, and loss of appetite. In addition, some expectant mothers may also experience symptoms such as dizziness and fatigue. If these situations occur, it is recommended to go to the hospital for treatment in time. Level 2: What should you pay attention to when you are pregnant for twenty days? What should you pay attention to when you are pregnant for twenty days?