Level 1: Can pregnant women use mosquito coils? In summer, mosquitoes are one of the biggest problems for people. For pregnant women, how to protect themselves and their fetuses from mosquito bites is also an important task. However, many people are worried that using mosquito coils will cause harm to the fetus. So, can pregnant women use mosquito coils? Level 2: Are the ingredients of mosquito coils harmful? Mosquito coils usually contain ingredients such as chloride and boric acid