Chills are not a precursor of pregnancy, because after pregnancy, the increase in hormone levels will lead to corresponding changes in the body, and due to individual differences, some people may be afraid of cold and others afraid of heat, which is a normal early pregnancy reaction. However, if you have chills before pregnancy and your hormone level has not increased, it may be caused by fever, which has nothing to do with pregnancy precursors. It is recommended to go to the hospital for further examination as soon as possible to exclude fever, and then understand the specific cause according to laboratory tests, and then give treatment. In addition, if you have a fever, pay attention to keep warm and wear more clothes to avoid aggravating the fever.