Whether eight out of ten in vitro fertilization will bleed can not be accurately judged, it is necessary to judge according to one’s own actual situation as well as the situation of conception, but usually the bleeding is a more common symptom, related to factors such as implantation status, embryo abnormality and so on. 1. Embryonic condition: In the process of IVF, bleeding may be caused by the fertilized egg implantation, which is generally a normal physiological phenomenon. When the embryo is implanted in the endometrium, it may damage the small blood vessels of the endometrium, which generally does not require special intervention. 2. Embryonic anomalies: IVF bleeding may also be caused by embryonic anomalies, such as recurrent vaginal bleeding due to embryonic dysplasia, which is generally associated with low human chorionic gonadotropin, progesterone and estradiol. Pregnant women should pay attention to the prenatal examination during pregnancy, actively listen to the advice of professional doctors to do a comprehensive nursing care, pay attention to rest, and at the same time should relax, avoid tension, anxiety. It is recommended that women should pay attention to the abnormal bleeding situation, and should consult the doctor in time to clarify the cause of the disease and carry out treatment under the guidance of the doctor.