The doubling of HCG in early pregnancy is a very important indicator. A normal pregnancy with a very good doubling of HCG also indicates a good viability of the embryo. If the HCG doubling is not good, it indicates that the quality of the embryo is not good and there is a high probability of embryonic abortion and unavoidable miscarriage in this state. The HCG level can be increased by the injection of human chorionic gonadotropin, but the effect depends on the viability of the embryo. Therefore, the process of injection is also observed while the injection is being given. If after the injection, some patients do show an increase and the fetus is able to develop normally, there is still a hope of preserving the pregnancy. If the hormone level remains unstable after the injection, be prepared for the inevitable miscarriage.