Pregnancy blood test does not necessarily require fasting, but should be conducted under the guidance of the doctor according to the content of the test. Fasting is required for biochemical tests such as liver and kidney function, thyroid function and fasting blood glucose, but not for routine blood tests, coagulation function, blood type, hepatitis B five indicators, and HIV, syphilis and hepatitis C antibody tests. Laboratory tests should be performed as prescribed by the doctor to understand the condition of the pregnant woman. Ultrasound should also be performed during pregnancy to check the development of the fetus and to rule out structural abnormalities. For example, early pregnancy ultrasound can identify intrauterine pregnancy, NT (nuchal translucency) measurement is performed at 11-13+6 weeks of gestation, and screening for fetal structural abnormalities is performed at 20-24 weeks of gestation, so that fetal anomalies can be detected as early as possible, and timely intervention can be provided to ensure the quality of the pregnancy. If you have any other questions, it is recommended to consult a professional doctor for guidance.