The timing of the first obstetric examination after pregnancy is not exactly the same among different pregnant women and needs to be determined according to the actual condition of the pregnant woman after pregnancy. Most pregnant women who do not have abnormal symptoms such as vaginal bleeding and abdominal pain in early pregnancy can have their first obstetric examination between 11 and 12 weeks of pregnancy. The examination requires both an early NT test as well as a general ultrasound, laboratory tests such as liver and kidney function tests, routine blood, urine, blood type and blood sugar. If you experience abnormal vaginal bleeding or significant lower abdominal pain in early pregnancy, you should promptly visit the hospital for the first ultrasound and other tests to assess the fetal development.