Low albumin in pregnant women may be due to physiological changes or caused by malnutrition, chronic gastrointestinal disease, liver and kidney disease: 1. Physiological changes: as the pregnancy week increases, the blood volume of pregnant women also gradually increases, while the synthesis of plasma albumin does not increase significantly, resulting in a decrease in the concentration of albumin in the blood, which is a normal physiological change during pregnancy; 2. Malnutrition: if pregnant women have insufficient nutritional intake during pregnancy, especially protein intake, low albumin will occur. Especially insufficient protein intake, malnutrition will occur, coupled with the strong metabolic capacity of pregnant women, increased protein decomposition, there will be low albumin; 3, chronic gastrointestinal disease: chronic gastrointestinal disease will hinder the absorption of nutrients, or incomplete absorption, resulting in low albumin; 4, liver disease: liver disease affects albumin synthesis, if pregnant women suffer from liver disease, it will lead to low albumin measurement result is low; 5, kidney problems: if pregnant women have kidney problems, such as nephrogenic hypoproteinemia, it will also lead to albumin loss. It is recommended that pregnant women eat more lean meat, eggs, fish, shrimp and other high-protein foods, do not eat spicy and stimulating foods, and maintain balanced nutrition. Regular maternity checkups to observe whether the low albumin situation is improving through re-examination. Pregnant women with gastrointestinal diseases or liver and kidney dysfunction can be treated symptomatically under the guidance of doctors.