Mosquito liquid can be used occasionally during pregnancy, but it is recommended not to use it for a long period of time, so as not to jeopardize the health and development of the fetus. Mosquito liquid contains pyrethroids, benzene, ether and other harmful substances, the occasional use of mosquito liquid during pregnancy is generally not harmful to the health of the fetus, but it is recommended to open the window in a timely manner after the use of ventilation, so that the harmful substances are emitted into the room again. If you use mosquito liquid for a long time during pregnancy, the chemicals in the mosquito liquid will be volatilized into the air through the heating, through the breathing of pregnant women into the body, easy to cause pregnant women to appear dry and itchy throat, pain, or skin redness, itching and other allergic symptoms, when serious, it will be through the placenta into the body of the fetus, resulting in fetal deformities, miscarriages and other hazards. Generally recommended that during pregnancy do not use mosquito liquid, such as the use of the recommended into the house before opening the window to ventilate, dispersing harmful substances before entering the house, should not be continued in the closed space.