The following we will take a look at which pregnant women are susceptible to hyperemesis, so that some pregnant mothers have a psychological preparation in advance and take preventive measures in advance. The survey shows that 40 percent of hyperemesis has a family history. In particular, expectant mothers whose closest relatives or siblings have high blood pressure are more likely to suffer from hyperemesis. The following 7 types of women are at high risk for hyperemesis and should have their blood pressure monitored: 1. 35 years of age or older; 2. obese with a body mass index over 24; 3. pregnant before the age of 20; 4. family history of hypertension; 5. history of hyperemesis; 6. pregnant with more than two children; 7. patients with diabetes during pregnancy. Since hyperemesis is a disease specific to pregnant women, the cause is not clear, but it is certain that the disease has a greater relationship with the hormonal changes in their bodies. Cai Jian said there is no particularly effective way to prevent hyperemesis, but 90 percent of people will heal on their own after giving birth, and only a small percentage of cases with severe kidney damage may be combined with nephritis. Studies have found that calcium supplementation can reduce the incidence or severity of hyperemesis gravidarum. Calcium supplements should be abundant before and after pregnancy. Pregnant women with hypertension should follow a diet low in salt, sugar and fat, and a balanced nutrition. In addition, stress may aggravate the development of the disease, so pregnant women should relax and take proper rest. Preventive care: insist on prenatal checkups and good health care during pregnancy. Blood pressure should be measured once in early pregnancy (3rd trimester) in order to know the basal blood pressure, and then checked regularly, i.e. at 16, 20, 24, 28, 32, 36, 37, 38, 39 and 40 weeks of pregnancy, and go to the hospital at any time if dizziness and swelling of lower limbs occur. Appropriate nutrition Increase the intake of protein, vitamins, iron, calcium and other trace elements. Pregnant women should reduce the intake of fat and excessive salt appropriately, which can play a certain role in preventing hyperemesis. 2 grams of calcium supplement daily from the 20th week of pregnancy can reduce the occurrence of hyperemesis.