Pregnancy may be chilly, the phenomenon is common in early pregnancy, may be caused by the following reasons: 1, in the early stage of pregnancy placenta is still in the development stage, the pregnant woman’s basal body temperature is high, so there will be fear of cold, chills phenomenon, belongs to the normal physiological phenomenon, early pregnancy will slowly return to normal; 2, pregnant women in early pregnancy if not supplemented with sufficient nutrients, will lead to poor physical quality, the phenomenon of chills. The phenomenon of chills, pregnant women should be supplemented with enough protein, fat, eat eggs, meat to supplement; 3, pregnant women with low thyroid function can also cause chills, pregnant women will also have endocrine disorders, slow metabolism and other symptoms. Therefore, pregnant women are more prone to chills in the early stages of pregnancy, so pay attention to keeping warm to avoid catching cold and flu, and also pay attention to nutritional balance to avoid malnutrition leading to decreased resistance.