Elevated liver aminotransferases in late pregnancy may be due to the following reasons: i. Pregnancy itself, inflammatory damage to the liver caused by the increase in fetal size and liver burden. Second, exclude whether the combination of HELLP syndrome, which is a complication of hyperemesis, mainly manifested as elevated transaminases and decreased platelets. Consider whether the patient has combined viral infections, especially hepatitis B virus infection, cytomegalovirus or EBV infection, etc. Fourth, consider whether there is fatty liver, because in the late pregnancy pregnant women intentionally eat more high-protein food in order to increase nutrition, etc., may lead to excessive weight gain and excess nutrition causing steatohepatitis.