Leakage is defined as continuous vaginal bleeding during pregnancy, which is also commonly known as preterm miscarriage. There are many causes of pre-eclampsia miscarriage, but after a pre-eclampsia miscarriage, a pregnant woman should not be overly alarmed. It is recommended to consult a local hospital immediately to identify the cause of vaginal bleeding and then treat the cause accordingly. First of all, fetal dysplasia is the most common cause of preterm abortion in early pregnancy. In this case, some kind of fetal preservation treatment is usually given. However, fertility preservation treatment is not always successful. Miscarriage is certain to occur in cases of preterm abortion due to chromosomal abnormalities. Second, cervical polyps can cause a small amount of vaginal bleeding. When this occurs, cervical polyp removal is required. Finally, vaginal bleeding caused by placental factors. Vaginal bleeding can occur from time to time when the fetus is developing and the placenta is low in the bed. This vaginal bleeding may be more or less frequent. Patients are advised to observe the amount of bleeding regularly after the diagnosis is clear. If the amount of vaginal bleeding is low, treatment can be observed at home. If the vaginal bleeding is prolonged and the amount of vaginal bleeding is high, then hospitalization in a local hospital for fetal preservation is recommended. In conclusion, in case of fetal leakage, patients are advised to consult a local hospital to identify the cause and provide symptomatic treatment.