In the early stages of pregnancy, vaginal bleeding with blood clots, there are three main possibilities to consider: first, the patient is pregnant in the uterine cavity, miscarriage, in this case the bleeding is relatively heavy, the development of inevitable miscarriage or complete miscarriage is very likely, and the chances of success in preserving the fetus are very low. The patient first needs to have an ultrasound to see if there is still a gestational sac in the uterine cavity. If the gestational sac still exists, you need to check the progesterone, HCG, to determine the activity of the gestational sac, according to the situation of fetal preservation or give up fetal preservation, uterine clearance surgery for treatment. Second, consider the possibility of ectopic pregnancy, the activity of the gestational sac in ectopic pregnancy is relatively low, so it is easy to appear vaginal bleeding. Third, consider the patient after pregnancy combined with vaginal or cervical lesions, in this case do ultrasound examination HCG and progesterone are very good, there is no abnormality. Need to do gynecological internal examination, at the same time according to the gynecological internal examination of cervical screening, or colposcopy and other further examination for judgment.