For the general population, the normal body temperature limit is 36.0-37.3 ℃, if the body temperature exceeds 37.5 ℃ is considered fever. However, for pregnant women, due to the body in a high metabolic state, increased thermogenesis, may also be accompanied by a certain increase in body temperature, generally does not exceed 37.5-38 ℃, and is more stable, temperature fluctuations are not big, and can not be called fever. If the usual body temperature is not so high, just in the cold or other triggers under the role of temperature fluctuations, does not exclude the possibility of fever.