For safety reasons, it is recommended that mosquito coils should not be used during pregnancy, and other safer ways of mosquito control can be used. Although mosquito coils that comply with national standards should be safe for ordinary people, but the composition is more complex, may contain harmful substances to the fetus, pregnant women should be avoided for safety reasons. Therefore, during pregnancy, the use of mosquito coils should be minimized to avoid adverse effects on pregnant women, it is recommended to take physical measures to prevent mosquitoes, such as the use of screens, mosquito nets and other anti-mosquito measures to prevent mosquitoes. If the use of mosquito coils in the process of any discomfort, should be as early as possible to the hospital to avoid adverse prognosis.