A short period of time or occasional exposure to fumes will not have too much impact on pregnant women and the fetus, such as long-term exposure to fumes, for pregnant women may stimulate the digestive system, nausea, loss of appetite and so on, and for the fetus, the toxic substances in the fumes, may pass through the placenta barrier to enter the body of the fetus, affecting the development of the fetus. Long-term exposure to oil smoke is detrimental to both the pregnant woman and the fetus. The most obvious effect on the pregnant woman is to aggravate the early pregnancy reaction, resulting in significant discomfort in the digestive tract and aggravating symptoms such as nausea and vomiting. For the fetus, toxic substances that enter the pregnant woman’s bloodstream through the lungs will enter the fetus through the placental barrier, affecting its growth and development. In addition, if a pregnant woman has a low appetite for a long time, it may also lead to malnutrition of the fetus. Therefore, pregnant women should breathe more fresh air, avoid the stimulation of fumes, if inhaling fumes after the emergence of obvious symptoms of discomfort, you need to consult a doctor in a timely manner, under the guidance of the doctor for treatment.