Usually, pregnancy reactions disappear around 12 weeks of pregnancy, but they are different for everyone. Pregnancy reactions can appear around 6 weeks of pregnancy. Common pregnancy reactions include drowsiness, dizziness, weakness, stomach upset, nausea, vomiting and so on. It reaches its peak in 8-10 weeks of pregnancy and basically disappears after 12 weeks of pregnancy. However, some pregnant women do not have any reactions during pregnancy, while others have severe reactions during pregnancy, which prevent them from eating and affect their normal life, and even persist after 12 weeks of pregnancy. If the reaction during pregnancy is so severe that it affects your normal life and prevents you from eating, you should go to the hospital for examination and, if necessary, hospitalization.