Can smelling pesticide fumes in the late stages of pregnancy affect the fetus?

Occasionally smelling insecticides during the late stages of pregnancy generally does not affect the fetus. However, prolonged inhalation of insecticides may pose risks to the developing baby. Specific details are as follows:

Insecticides contain tetramethrin, which is mildly toxic and works by affecting the central nervous system of insects to kill them. Although the toxicity is low, prolonged human exposure may lead to symptoms such as nausea, dizziness, and in severe cases, shock. If a pregnant woman only occasionally smells insecticide and experiences no other discomfort, it typically does not cause adverse effects on the fetus.

However, long-term inhalation of insecticides may allow harmful substances to enter the bloodstream through the respiratory tract, potentially causing fetal malformations or even miscarriage. Pregnant women are advised to avoid inhaling irritant gases and toxic substances. It's recommended to frequently open windows for ventilation to maintain fresh indoor air, while taking care to prevent direct drafts blowing on the pregnant woman to avoid catching a chill. Regular prenatal checkups during pregnancy are also important to monitor the health and development of the fetus.