Pregnant women with a fever of 38.5 ℃, in early pregnancy will have an impact on the fetus, the impact of late pregnancy is smaller, pregnant women with fever should go to the hospital as soon as possible for treatment. 38.5 ℃ belongs to the low fever, pregnant women fever on the fetus may have certain adverse effects, if in early pregnancy may cause fetal dysplasia, resulting in fetal malformation, etc.; late pregnancy due to the development of various fetal organs are more mature, may be relatively small impact, but do not rule out that will affect the normal development of the fetus. If a pregnant woman has a fever, she can use wet towels to apply cold compresses, warm water to wipe her body, antipyretic patches and other methods to lower her temperature. She should go to the hospital as soon as possible for treatment, and at the same time, pregnant women need to be cautious about the use of medication, and if they need to take medication, it is recommended that they do so under the guidance of a doctor. Pregnant women during pregnancy should pay attention to do a good job of prenatal checkups, actively listen to the advice of professional doctors to do a good job of comprehensive care and health care, pay attention to rest, at the same time should be relaxed, to avoid nervousness, anxiety, there is any discomfort should be timely to the hospital, by the doctor to clarify the diagnosis, and cooperate with the doctor to deal with the symptoms.