Insecticides can irritate and cause discomfort to pregnant women, while some insecticides can affect the development of the fetus, leading to malformation. Insecticides contain many harmful substances, such as organophosphorus and carbamate insecticides, used to kill mosquitoes and insects of the ingredients, these chemicals will have an impact on pregnant women. Part of the pesticide flavor as well as the nature of the relative stimulation, pregnant women inhalation will irritate the respiratory tract and digestive mucosa, choking and coughing as well as abdominal pain and so on, excessive coughing and abdominal pain, diarrhea and other discomforts may affect fetal development. Secondly, the harmful substances in the insecticide long-term exposure, may affect fetal health, resulting in fetal developmental delay and so on, so the use of chemical substances during pregnancy need to try to choose pregnant women special products that do not have any harmful effects on pregnant women.