Bleeding in early pregnancy may be caused by miscarriage, ectopic pregnancy, cervical lesions and other factors. 1. Miscarriage: Miscarriage can be characterized by abnormal vaginal bleeding, abdominal pain, and the formation of blood clots when more blood is discharged within a short period of time. 2. Ectopic pregnancy: bleeding in early pregnancy may also be ectopic pregnancy, is a common gynecological emergencies, ectopic pregnancy patients will appear in the early phenomenon of blood clots, accompanied by abdominal pain, need to be identified by ultrasound and intrauterine pregnancy miscarriage. 3. Cervical lesions: If a woman has cervical lesions, she will also experience vaginal bleeding. In short, if there is a bleeding block in the early stages of pregnancy, you should go to the hospital for ultrasound examination, to clarify the cause of the disease, and under the guidance of the doctor to actively treat.