Pregnant women smell mosquito coils have a certain adverse effect on the baby. Mosquito coils are a common way to get rid of mosquitoes in daily life, mosquito coils in the insecticide components for mosquitoes have a very strong repellent and killing effect, these insecticides for ordinary people do not have much impact, but for pregnant women in the womb of the baby has a negative impact, may lead to deformities in the baby. In addition to insecticides, mosquito coils in the burning process of smoke and mosquito coils in the adhesives, dyes and other ingredients may also have a negative impact on the growth and development of the baby. Pregnant women who occasionally smell mosquito coils, generally will not have an adverse effect on the baby, do not need to worry about some all the time. Pregnant women can use screens, mosquito nets and other ways to prevent mosquito bites.