Under normal circumstances, there is no bleeding after pregnancy, once bleeding occurs, we have to think about whether the following situations: the first, the most common is the aura of miscarriage, once the aura of miscarriage, we have to timely treatment of abortion. The second, is not the embryo has stopped the development of spontaneous abortion, if the ultrasound suggests that the embryo has stopped the development of the uterus, we must promptly carry out the operation of the uterus, if you do not promptly clear the uterus, it is likely to cause the infection of the uterine cavity. The third, to rule out the cervix has no lesions, such as the cervix long some superfluous organisms, the most common is the cervical polyps, cervical inflammation, the worst is the cervical malignant tumors, will lead to vaginal bleeding. Less common is to rule out a serious and more dangerous situation, namely ectopic pregnancy, because in the early stages of ectopic pregnancy can also appear vaginal bleeding, and once the ectopic pregnancy can be life-threatening.