Electric blankets should not be used during pregnancy. Electric blanket is a kind of heating tool that can be in direct contact with the body, and it can produce certain electromagnetic radiation, which has certain adverse effects on the development of the fetus and the health of the pregnant woman. First of all, the electromagnetic radiation produced by electric blankets will affect the normal differentiation of embryonic cells in the early stage of embryonic development, which may cause abnormal development of embryonic cells and lead to malformation of the fetus. Electromagnetic radiation is also prone to cause symptoms such as elevated blood pressure, rapid heart rate and irritability in pregnant women. Secondly, during pregnancy due to increased fetal compression to slow down bowel movements, pregnant women are prone to constipation, the temperature generated by the electric blanket, so that the body of water evaporation is more prone to aggravate the constipation of pregnant women, but also cause pregnant women with dry mouth, dry skin, so that pregnant women sleep quality is reduced, mental instability and other symptoms. In addition, for pregnant women with particularly sensitive skin, the use of electric blankets is also likely to cause allergies.