Household activated carbon has no effect on the health of pregnant women and has great benefits. The main component of activated carbon is carbon, which is similar to coal in daily life, except that it has undergone carbonization and activation treatment, resulting in microscopic activated carbon with many pore sizes, which has strong adsorption properties and can absorb harmful substances in the air, such as formaldehyde, and the activated carbon itself is not volatile, so it does not release harmful gases and is harmless to pregnant women. However, it should be noted that activated carbon can be saturated with harmful substances, and if the activated carbon is saturated and exposed to high temperatures, the harmful gases may be released again, but it is relatively harmless because it is the harmful substances adsorbed from the environment. Therefore, women who are pregnant can place activated carbon at home.