Pregnancy checkups can generally be done with vaginal ultrasound, but abdominal ultrasound is also an option (requires drinking a lot of water + holding urine), and the first checkup can be done 5 to 6 weeks after conception. Women who suspect that they are pregnant generally need to go to the hospital to complete the human chorionic gonadotropin blood test, the test value is significantly higher, suggesting that there is a possibility of pregnancy, but can not fully diagnose the pregnancy, need to be combined with gynecological ultrasound to confirm the diagnosis. Gynecological ultrasound includes vaginal ultrasound and abdominal ultrasound, of which abdominal ultrasound requires drinking a lot of water and holding urine in advance to show the changes of the uterus and ovaries through the contrast of light and dark images. In clinical practice, both types of ultrasound are generally available, but abdominal ultrasound is more commonly used. In order to avoid the pregnancy sac being too small to be seen, it is generally recommended that a gynecologic ultrasound be performed 5 to 6 weeks after conception, and a pregnancy can be diagnosed if a pregnancy sac is seen in the uterine cavity. In addition, pregnant women should complete regular maternity checkups during pregnancy.