Usually, pregnant women do not feel anything in the first few days of pregnancy, and most of them start to have early pregnancy reactions in the 5th-6th weeks of pregnancy. In the first few days of pregnancy, the fertilized egg is only laid and developed, and the hormones in the body have not yet changed significantly, so usually pregnant women will not feel anything. When the HCG rises significantly and the estrogen and progesterone in the body change significantly, 60%-80% of pregnant women will have early pregnancy reactions, but the specific performance will vary from person to person. Most pregnant women will experience nausea, vomiting, acid reflux, loss of appetite, drowsiness, fatigue, dizziness, breast pain, etc. Some patients will experience partial eating, etc. These are normal phenomena of progesterone stimulation and need not be overly worried, and usually last until the 12th week of pregnancy and will subside on their own. In addition, women should also pay attention to ensure sufficient sleep, healthy diet, happy mood, more exercise, keep indoor ventilation, and do not use medication without authorization after pregnancy.