Pregnancy reactions usually disappear gradually around 12 weeks of pregnancy. Pregnancy reactions usually appear in the 5th week of pregnancy, i.e. after about 35 days of menopause. Some pregnant women may feel sudden fear of cold, bitterness in the mouth, tastelessness of food, nausea, vomiting, aversion to oil, fatigue, easy drowsiness and other conditions. The severity of pregnancy reaction varies from person to person and the performance varies. Most pregnant women only have the above-mentioned mild pregnancy reactions, which basically do not need to be treated and will disappear on their own after 12 weeks of pregnancy. There are some pregnant women who have a feeling of fullness caused by the enlargement of the uterus and the upward movement of organs such as the stomach and intestines throughout pregnancy, and some pregnant women may have no obvious symptoms; only a few pregnant women may have severe pregnancy reactions, such as severe pregnancy vomiting, or even inability to eat, and in serious cases, even termination of pregnancy, which can be improved by fasting and infusion treatment. Therefore, in the early stage of pregnancy, it is recommended to choose foods suitable for your taste, to eat easily digestible and high-calorie foods, to drink more water, to eat more vegetables and fruits, to eat small and frequent meals, to maintain oral hygiene, and to take appropriate vitamin B6 supplements to prevent and treat heavy pregnancy vomiting. After the mid-pregnancy reaction disappears, pay attention to a nutritious and varied diet.