Being pregnant and working at a gas station can have adverse effects. First of all, there is a lot of lead in the gasoline and diesel fuel in the gas station, and lead is a heavy metal that will accumulate in the body and cause lead poisoning if exposed for a long time. Lead acts on the central system of the human body, which is very unfavorable to the health of pregnant women and the normal development of the fetus. Secondly, in the process of refueling the car into the gas station, it will produce a large amount of exhaust and dust, which contains a large number of harmful substances, such as nitrogen oxides, nitrogen dioxide, hydrocarbons, carbon monoxide, as well as highly carcinogenic benzene compounds and pathogenic microorganisms. These substances are very detrimental to pregnant women, especially in the early stages of pregnancy, a large number of harmful substances are prone to cause abnormal cell differentiation of the embryo, and even cause miscarriage. Finally, carbon monoxide also affects the synthesis of normal hemoglobin, which can easily lead to the occurrence of anemia during pregnancy.