It is recommended that a full set of tests such as liver function, kidney function, blood routine, urine routine, etc. should be done in late pregnancy. Liver function refers to the use of various biochemical test methods to detect metabolism and related indicators, which can reflect the normal condition of the liver. Pregnant women usually need to take liver function tests at 6-7 weeks of pregnancy to determine whether there is underlying liver disease, and should take liver function tests in the middle and late stages of pregnancy to check whether liver function has been affected during pregnancy, and still need to take another liver function test before giving birth to make sure that there are no factors affecting the labor and delivery and post-partum recovery of the pregnant woman. Liver function test is necessary for pregnant women, the test is required to fasting, daily attention to diet and hygiene, pay attention to rest, avoid staying up all night labor.