The chances of miscarriage in early pregnancy bleeding are not necessarily, leading to bleeding in early pregnancy for a number of reasons, such as fertilized egg implantation, luteal insufficiency and chromosomal abnormality of the embryo, etc. The probability of miscarriage caused by bleeding of different etiologies is not the same. 1. Fertilized egg implantation: some patients may experience a small amount of vaginal bleeding, which hardly leads to miscarriage, but need to pay attention to pubic hygiene and prevent infection. 2. Luteal insufficiency: patients may have insufficient progesterone secretion to maintain the pregnancy, resulting in bleeding and miscarriage symptoms, patients need to follow the doctor’s instructions to timely supplement progesterone, such as progesterone and so on. If the symptoms improve, the probability that the patient can continue the pregnancy is higher; if the vaginal bleeding increases and the uterine opening has been opened, the probability of miscarriage is higher. 3. Abnormalities of embryonic chromosomes: the most common cause of miscarriage, the probability of miscarriage caused by different chromosomal abnormalities is not the same, modern research shows that, in spontaneous abortion, 46% to 54% of embryonic chromosomal abnormalities related to. Under the same etiology, the probability of miscarriage varies due to the different amount of vaginal bleeding and the closure of the uterine orifice, etc. Therefore, if the symptoms of vaginal bleeding occur during pregnancy, it is necessary to consult a doctor in time to clarify the cause of the disease and then treat it under the guidance of the doctor.