If the symptoms of miscarriage are not relieved or worsened by fertility preservation treatment, if ultrasound shows that the embryo is underdeveloped, and if laboratory tests do not improve, then fertility preservation is unsuccessful. In early pregnancy, when there are symptoms of miscarriage such as abdominal pain, vaginal bleeding, and lowered levels of progesterone, HCG (human chorionic gonadotropin), and estradiol, it is necessary to follow the doctor’s instructions to actively preserve the fetus. However, if the symptoms of miscarriage are not relieved or worsened after treatment, if ultrasound examination indicates that the embryo is not well developed, and if the levels of progesterone and blood HCG do not rise or fall, it is most likely to indicate that fetal preservation has failed. Due to the unstable development of the embryo in early pregnancy, it is necessary to avoid strenuous exercise and physical labor, continue to take folic acid on time as prescribed by the doctor, and appropriately increase dietary nutrition. When symptoms of preeclampsia appear, it is necessary to follow the doctor’s advice to give timely treatment of abortion preservation, and repeat ultrasound and progesterone, blood HCG levels to evaluate the effect of abortion preservation.