Obstetrical checkups include laboratory tests, relevant tests for abnormalities, ultrasonography, fetal heartbeat monitoring and so on. 1. Relevant laboratory tests: such as routine blood test, routine urine test, blood test, liver and kidney test, Hepatitis B 5, coagulation function, Hepatitis C antibody and AIDS antibody screening, etc., which can rule out infectious diseases and understand the condition of pregnant women themselves. 2. Relevant detector tests: such as NT (fetal nuchal translucency) ultrasonography in early pregnancy, Down’s syndrome screening or non-invasive prenatal testing technology in mid-pregnancy, amniocentesis, etc., ultrasonography of fetal structural system. 3. Ultrasonography: Early pregnancy ultrasonography can clarify the normal intrauterine pregnancy; ultrasonography in the middle and late stages can understand fetal development, and can detect fetal umbilical cord blood flow, physical scoring, etc., which can assist in determining the intrauterine condition of the fetus. 4. Fetal cardiac monitoring: Fetal cardiac monitoring is an indispensable auxiliary examination method in obstetrics, which can continuously monitor the dynamic changes of fetal heart rate, and at the same time, it can also record the contraction and fetal movement, which is usually carried out after 34 weeks of pregnancy, and can be carried out on the instructions of the doctor for those who have pregnancy syndromes.