Most pregnant women will have an elevated body temperature in the first month of pregnancy, which refers to an increase of 0.3-0.5℃ compared to the usual basal body temperature, usually not exceeding the normal body temperature, mostly between 36.9-37.2℃. The rise in body temperature in early pregnancy is due to the formation of the corpus luteum by the ovaries after ovulation, which secretes progesterone, which can raise the body temperature. If the egg is successfully fertilized, the corpus luteum will continue to secrete progesterone and the body temperature will remain high for about 3 months. From the middle of pregnancy, the body temperature will gradually return to the original basal body temperature and the secretion of progesterone is replaced by the placenta. In addition, if there is an abnormally high body temperature in early pregnancy, such as persistently exceeding 38.5℃, and there are other discomforts such as coughing, coughing and sore throat, you need to be alert to the possibility of cold and fever, and go to the hospital in time to clarify the cause for targeted treatment, because a prolonged high fever in pregnant women may affect the growth and development of the fetus. In addition to monitoring the temperature in early pregnancy, it is also necessary to pay attention to regular diet and rest, because the change of status has just occurred, there may be certain psychological fluctuations, pay attention to adjusting the mentality, appropriate supplementation of folic acid to help prevent fetal neural tube malformation, eat more fresh vegetables and fruits, avoid staying up late and avoid overwork.