Human chorionic gonadotropin shots may double, depending on the results of the tests that are reviewed. Human chorionic gonadotropin (HCG) is an important hormone in the maintenance of pregnancy, and can usually be detected in maternal serum 1 day after the fertilized egg has been deposited, with levels doubling at 1-2 day intervals. When the blood HCG level is low, low molecular heparin subcutaneous injection can be given under the guidance of the physician to protect the fetus treatment, but also recheck the blood HCG level to determine the effect of medication. When blood HCG doubles slowly in early pregnancy, there may be a risk of embryo loss, and ultrasonography may be used in conjunction with the ultrasound examination to understand the development of the embryo. If the HCG level is normal after active treatment and the embryo is well developed, the pregnancy can be continued. However, if the HCG level does not increase or decreases, and the ultrasound suggests that the embryo is not well developed, it means that miscarriage is inevitable and the pregnancy should be terminated in a timely manner.