Bleeding in early pregnancy is an abnormal phenomenon that suggests the possibility of preterm miscarriage or miscarriage or ectopic pregnancy. There is no bleeding during a completely normal pregnancy. The possible causes of intravaginal bleeding in early pregnancy include: 1) abnormal development of the embryo due to various factors; 2) abortion due to luteal insufficiency of the ovaries and insufficient progesterone level; 3) abnormal bleeding due to stimulation of sexual life, strenuous sports and heavy physical labor, which induce uterine contraction; 4) possible ectopic pregnancy rupture or miscarriage. The possibility of ectopic pregnancy rupture or miscarriage. When symptoms of abnormal bleeding occur, pregnant women should go to the hospital as soon as possible with the assistance of their family members for ultrasonography and laboratory tests to clarify the diagnosis and provide timely treatment.