Most pregnant women in the first month of pregnancy will have an elevated body temperature, this elevation refers to 0.3-0.5 ℃ higher than the usual basal body temperature, generally does not exceed the normal body temperature, mostly between 36.9-37.2 ℃. The rise in body temperature in the early stages of pregnancy is due to the fact that after ovulation, the ovarian follicle forms the corpus luteum, which secretes progesterone, and progesterone 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 mid-pregnancy onwards, the body temperature will gradually return to the original basal body temperature and the secretion of progesterone will be replaced by the placenta. In addition, if the body temperature is abnormally high in early pregnancy, such as persistently exceeding 38.5 ℃, and there are other discomforts such as coughing, coughing up sputum, sore throat, etc., we need to be vigilant about the possibility of colds and fever, and we should go to the hospital in time for consultation, to clarify the cause of the disease and then targeted treatment, because a long period of high temperature in pregnant women may affect the growth and development of the fetus. In addition to the monitoring of body temperature in early pregnancy, we should also pay attention to regular diet and rest, because the identity of the change has just occurred, there may be a certain fluctuation in psychology, pay attention to regulating the state of mind, appropriate supplementation of folic acid, to help prevent fetal neural tube deformity, eat more fresh vegetables and fruits, avoid staying up late, avoid excessive exertion.