Biochemical tests during pregnancy include liver function, kidney function, blood glucose, blood lipids, thyroid function, five viruses, trace elements, ferritin, vitamins A, E and K. These tests are usually done in the early stages of pregnancy and require a comprehensive assessment of the pregnant woman’s physical condition during pregnancy to see if her liver and kidney functions are suitable for pregnancy. In another case, these tests can also be done during the preparation period, which is more conducive to evaluating the physical condition of the pregnant woman and assessing whether she is capable of handling the pregnancy and whether her body can bear the changes during the whole pregnancy.