In the early stages of pregnancy, the blood HCG level is at least 15-50 U/L or higher. It increases gradually with the number of weeks of gestation and can especially show a doubling. In the first two weeks of pregnancy, the blood HCG level can reach about 50-500 U/L. If this value decreases in the early stages of pregnancy, it cannot be ruled out that the patient is suffering from a preterm miscarriage. The patient should go to the local public hospital for blood progesterone test and pelvic ultrasound to determine if there is any disease in combination with the early pregnancy reaction of the pregnant woman. According to the specific examination results, further treatment will be provided under the guidance of a professional obstetrician and gynecologist.