TVOC that is, total volatile organic compounds, three kinds of indoor air quality pollution in the impact of a more serious, refers to the room temperature saturated vapor pressure exceeds 133.32Pa organic matter, at room temperature can be evaporated form exists in the air. Toxicity, irritation, carcinogenicity and special odor, air more than a certain concentration will affect the skin and mucous membranes, acute damage to the human body, will endanger the health of pregnant women, increase the risk of miscarriage, as well as affect the normal development of the fetus. 1. Hazardous to the health of pregnant women: may cause headache, fatigue, chest tightness, poor vision and other adverse reactions to the health of pregnant women. 2. Increase the risk of miscarriage: It is a carcinogen, long-term inhalation or exposure will cause abnormal vomiting, headache, insomnia and other pregnancy reactions, and may cause miscarriage in early pregnancy. 3. Affecting the normal development of the fetus: It is very harmful to the development of the embryo and fetus, affecting the growth and development of the fetus’ nervous system as well as various organs, and in serious cases, it may lead to fetal deformity or stillbirth. Pregnant women should avoid prolonged exposure to high concentrations of TVOC, and should seek medical advice if they feel unwell.