Generally, most pregnant women will begin to experience a reduction in pregnancy sickness around 10 weeks, but due to individualized differences, the timing of the reduction of pregnancy sickness is not the same. The appearance and disappearance of early pregnancy reactions are mostly consistent with the rise and fall of HCG levels, and most of the vomiting occurs before the 10th week of pregnancy, with nausea and vomiting typically appearing around the 6th week of pregnancy and worsening with the increase in the number of weeks of pregnancy. Persistent vomiting, inability to eat and other serious phenomena can occur from 8 to 10 weeks of pregnancy, and after 10 weeks, with the decline of HCG, pregnancy vomiting is reduced. However, due to the differences in the physical condition and lifestyle of pregnant women, the time for the relief of vomiting is also different. Some pregnant women may not experience vomiting, while others may experience vomiting throughout the entire pregnancy. Meanwhile, it should be noted that pregnant women should develop good living habits and balanced nutrition, which will help reduce pregnancy sickness.