The body will be hot at the beginning of pregnancy, usually the body temperature will gradually return to normal after the middle of pregnancy. After ovulation, the female follicle forms the corpus luteum to secrete progesterone, which causes the female body temperature to rise, and the female can determine the ovulation time according to the temperature monitoring. If the sperm and egg combine, the corpus luteum continues to secrete progesterone, so the body temperature of pregnant women at the beginning of pregnancy is about 0.3-0.5℃ higher than the usual body temperature, and more sensitive women can feel their body temperature rising. If the body temperature of pregnant women is higher than 37.5℃ and accompanied by uncomfortable symptoms, consider the patient has fever, and it is recommended to go to the hospital for treatment as early as possible to avoid damage to the body. Although pregnant women have high body temperature, they should also pay attention to keep warm and avoid wind chill and catching cold to avoid upper respiratory tract infections producing cough symptoms that can affect the fetus.