Prenatal checkups during pregnancy are an important means of ensuring the safety of the pregnant woman and the fetus, and all pregnant women are required to undergo regular prenatal checkups. Prenatal checkups include taking a medical history, physical examination, and auxiliary examinations. Auxiliary examinations include blood tests, ultrasonography and necessary radiological examinations. In the early stage of pregnancy, the main contents of blood tests for pregnant women include: blood routine, blood type, coagulation function, hepatitis A antibody, hepatitis B penta, hepatitis C antibody, HIV and syphilis tests, liver function, kidney function, blood glucose test, thyroid function, etc. These tests need to be checked as early as possible during pregnancy, and require that they be done at the first time after the pregnancy is known in order to rule out any potential diseases in pregnant women in the pre-pregnancy period and early stages of pregnancy, and to Evaluate the possibility of continuing the pregnancy, as well as the risks to the pregnant woman and the fetus during pregnancy, and know how to avoid the transmission of diseases from the pregnant mother to the fetus. During pregnancy, blood is drawn every month for routine tests to check for changes in blood pigment and platelets, and routine urine tests are required at every delivery to check for kidney damage. In order to avoid the effects of the pregnant woman’s own illnesses on the fetus, the first prenatal checkup is as comprehensive as possible, so that the illnesses of the pregnant woman can be detected, diagnosed, and treated at an early stage. Subsequently, in the middle and late stages of pregnancy, blood will be drawn one by one for the following tests: regular blood tests, Down’s syndrome screening, glucose tolerance, biochemistry, etc. The purpose of these tests is to rule out the presence of fetal diseases. The purpose of these tests is to rule out chromosomal abnormalities in the fetus and complications during pregnancy, including gestational diabetes mellitus, acute fatty liver of pregnancy, preeclampsia, acute fatty liver of pregnancy, intrahepatic cholestasis, etc. The above tests are part of the prenatal checkup. All of the above tests are the basic tests that pregnant women need to do during prenatal checkups. If a pregnant woman has a combination of other systemic diseases or serious obstetric complications during pregnancy, additional tests are needed to assess the severity of the disease and its impact on the fetus. Therefore, there are many blood tests during pregnancy, and it is recommended that pregnant women undergo regular prenatal checkups and follow the doctor’s instructions to have blood tests done in a timely manner.