Does the smell of fly repellent cause birth defects in pregnant women?

Patient's question:

I have recently experienced pregnancy, and I feel that my physical condition is somewhat weak. There are a lot of mosquitoes and flies at home. When sleeping, I lit some mosquito coils. Will pregnant women get birth defects from smelling mosquito coils?

Doctor's answer:

During pregnancy, especially in the early stages, is a critical period for fetal development. It is recommended that pregnant women pay close attention and avoid using mosquito coils, as they contain toxic substances. If you are already seven months pregnant and have only used them occasionally, it is generally not a significant concern, so there is no need to worry too much. During pregnancy, avoid exposure to radioactive elements, noise, and toxic or harmful chemicals. Avoid contact with pets and taking medications, and ensure you get adequate rest while attending prenatal check-ups on schedule.

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