Can pregnant women sleep with mosquito-repellent incense lit?

Mosquito coils are insect-repellent products; when ignited, the active ingredients in the coil release smoke that either repels or kills mosquitoes. China has a long history of using mosquito coils, with traditional varieties classified into two types: stick incense and spiral (coil) incense. So, can pregnant women safely sleep in a room where mosquito coils are burning? Below, we address this question.

Can pregnant women sleep in a room with burning mosquito coils?

In general, it is not recommended for pregnant women to sleep in a room where mosquito coils are burning. Mosquito coils contain low-toxicity substances, including insecticides, binders, organic fillers, and additives. The smoke produced during combustion contains numerous harmful compounds that may trigger asthma in pregnant women. Moreover, prolonged exposure—especially in poorly ventilated rooms—can cause symptoms such as chest tightness, dizziness, and even loss of consciousness in pregnant women. This may lead to decreased fetal movement and fetal hypoxia. Therefore, mosquito coils—and other chemical-based repellents—should be avoided during pregnancy. The safest, non-toxic method of mosquito prevention is physical barrier protection, i.e., using window screens and mosquito nets to keep mosquitoes outside the living environment.

Knowledge Extension: Key Precautions During Early Pregnancy

1. Emotional Well-being

During the first month of pregnancy, women may experience emotional instability, which can adversely affect fetal development and increase the risk of miscarriage. Therefore, maintaining a positive and relaxed mood is highly advisable. Additionally, the first trimester (first three months) is a critical period for fetal neural tube development. Expectant mothers should therefore avoid environments containing tobacco smoke, alcohol, or hazardous chemicals.

2. Radiation Exposure

During the first month of pregnancy, women should minimize exposure to electromagnetic radiation. When watching television, maintain a safe distance; likewise, limit use of mobile phones, computers, and microwave ovens whenever possible. Furthermore, skincare products selected during pregnancy should meet five criteria: natural origin, safety, professional formulation, proven efficacy, and foundational suitability—ensuring no harm to either mother or fetus while effectively addressing common skin concerns associated with pregnancy.

3. Avoiding Sexual Intercourse

Sexual intercourse is not advised during the first month of pregnancy. At this stage, the placenta has not yet fully matured, and its attachment to the uterine wall remains weak, resulting in insufficient anchoring of the embryo within the uterus. Concurrently, inadequate progesterone secretion fails to provide adequate hormonal support to sustain the pregnancy. Engaging in sexual activity at this time may therefore increase the risk of miscarriage.

The above outlines whether pregnant women can safely sleep in a room with burning mosquito coils. We hope this information proves helpful.