Early pregnancy by progesterone will increase the body temperature, because progesterone has the effect of raising the body temperature, the body temperature usually rises 0.5-1 ℃, if more than this range and accompanied by other symptoms, it may be other diseases caused by the increase in temperature, need to consult a doctor in time. Pregnant women are usually very afraid of heat and continue throughout the pregnancy, is the thyroid function changes, hormone increase caused by pregnant women afraid of heat and body temperature will continue throughout the pregnancy, because of the influence of progesterone throughout the pregnancy, do not need special treatment. Source: Dr. Yurai