Sweating while sitting still at 39 weeks+3 weeks of pregnancy may be caused by high basal metabolic rate, emotional stress or anemia, and excessive estrogen secretion. 1. High basal metabolic rate: the hormone level of the pregnant woman’s body will be affected during pregnancy, a slight decline in early pregnancy, in the middle of pregnancy and gradually increase, to the late pregnancy can be increased by 15% -20%, easy to sweat. 2. Emotional tension: If there is too much psychological pressure and excessive mental tension during pregnancy, it is also easy to cause sweating. 3. Anemia: If you are picky about what you eat during pregnancy, resulting in unbalanced nutrition and anemia, your body will be weaker and you will be prone to sweating. 4. Excessive estrogen secretion: During pregnancy, the estrogen secretion of pregnant women will increase significantly, which will lead to enhanced adrenal cortex function, increase metabolic capacity, blood circulation increases, easy to sweat. Women should pay attention to rest during pregnancy, do not overwork, in addition to relax, do not overstress, usually also need to wear loose breathable clothes.