The common causes of elevated ghrelin caused by pregnancy are as follows: 1. liver damage caused by pregnancy itself, as the fetus increases the liver burden becomes heavier and heavier, there is a possibility of liver inflammation. 2. the combination of viral infections during pregnancy, commonly EBV, cytomegalovirus, hepatitis B virus, rubella virus, etc., leading to inflammatory necrosis of the liver. 3. some pregnant women in early pregnancy due to severe pregnancy reaction. severe vomiting leading to insufficient energy intake causing inflammation of liver cells.4. In early pregnancy certain pregnant women cause certain damage to the liver due to the use of fetus-preserving drugs, such as dydrogesterone and progesterone.5. After pregnancy, excessive nutritional intake leads to fatty liver disease.6. In mid- to late pregnancy, acute fatty liver of pregnancy occurs, which is one of the common critical illnesses of pregnant women.7. In late pregnancy, hemolysis, elevated transaminases, and HELLPS syndrome with decreased platelets