Pregnancy reaction refers to early pregnancy reaction, which usually ends around 12 weeks of pregnancy. Influenced by the level of chorionic gonadotropin in pregnant women, it usually starts to appear from about 6 weeks of pregnancy, with specific manifestations such as nausea, vomiting, loss of appetite, change in eating habits, easy fatigue, drowsiness, etc. Some pregnant women will also experience changes in mood, with high mood swings and special sensitivity. From 6 to 10 weeks of pregnancy, the chorionic gonadotropin rapidly doubles, and the pregnancy reaction is the most serious at this stage. After 10 weeks, the hormone level gradually decreases and maintains a more stable state until the late pregnancy. Therefore, the early pregnancy reaction will be gradually relieved from about 10 weeks, and the early pregnancy reaction of most pregnant women will have disappeared around 12 weeks. Early pregnancy reaction is a normal physiological condition, and most of them can be relieved naturally without special treatment. It is recommended to keep a good state of mind and a light diet during this stage.