When pregnant, the body temperature is higher than normal, rising by about 0.3-0.5°C relative to the time when you are not pregnant. Taking the underarm temperature as an example, the human body temperature fluctuates between 36.0-37.0℃. When a pregnant woman is pregnant, her basal metabolic rate increases due to the obvious rise in progesterone, and the increase in basal metabolic rate leads to a relative increase in basal body temperature, which, together with the neuroregulatory effect and the insulation effect of body fat, makes it normal for the body temperature to rise by 0.3-0.5℃ in early pregnancy. Generally speaking, the basal body temperature in non-pregnancy is around 36.5℃, and after pregnancy, it will be maintained between 36.9-37.2℃. This high temperature usually lasts for about three months, and the body temperature will gradually return to its original level after the third trimester of pregnancy. If the body temperature exceeds 37.5℃, it is possible that you have a fever and should go to the hospital for examination in time. During pregnancy, pregnant women should pay attention to keeping warm, work and rest reasonably, do some simple exercises to improve their immunity and try not to make themselves sick. If you get sick during pregnancy, you must be careful with your medication to avoid harming yourself and your fetus.