1. Causes of dizziness and dizziness in pregnant women 1.1 Physiological factors During pregnancy, due to the growth and development of the fetus, physiological changes such as increased maternal blood volume and cardiac output will occur. These changes can cause symptoms of dizziness and dizziness in pregnant women. 1.2 Malnutrition Pregnant women need to consume a large amount of nutrients during pregnancy. Insufficient intake or malabsorption will lead to various physical problems, including dizziness and dizziness. 1.3 Lack of sleep during pregnancy