The normal body temperature of pregnant women should be 36-37.2°C. Therefore, 37.4°C is considered a fever, which is low. If there is no other discomfort, pay attention not to use drugs at will, the drugs may have an impact on the fetus. You can drink more warm water and retest the temperature after half an hour. If the temperature does not rise significantly, it usually does not need intervention and can be relieved by itself. Of course, the temperature can also be cooled by physical methods, using warm water to wipe the neck, armpits, thigh roots to cool down, or cold compresses on the forehead to achieve the cooling effect. If the fever lasts longer or worsens, accompanied by headache, runny nose, cough and other symptoms, you need to go to the hospital for examination in time. If it is early pregnancy, it is recommended to do pelvic 3D ultrasound to note whether there is fetal heart and fetal bud in the uterine cavity, and also to determine whether the embryo is developing normally in conjunction with the gestational week. If it is late pregnancy, the pregnant woman’s elevated body temperature may affect the fetus’ oxygen supply, and the blood flow of the umbilical artery and middle cerebral artery can be measured, as well as the fetal heart monitoring, and then judged and treated accordingly. When pregnant women go to the fever clinic, they should pay attention to good personal protection and it is recommended to wear N95 mask or medical surgical mask. Drink plenty of warm water in daily life and pay attention to keeping warm to prevent getting cold.