Bleeding at the cervical opening of a pregnant woman may be due to preeclampsia, placenta praevia, cervical polyps, etc., which need to be treated in time. 1. Pre-eclampsia: cervical bleeding may be related to pre-eclampsia, early pregnancy due to embryonic dysplasia, maternal factors, sexual life can lead to cervical bleeding, which can be manifested as the cervical opening is not open, the uterus size is consistent with the gestational weeks, but there is a cervical bleeding, the need for bed rest, fertility preservation treatment. 2. Placenta praevia: caused by a variety of factors, in late pregnancy, the lower edge of the placenta covers the cervical opening, and the attachment of the uterus is misplaced, is the most common cause of cervical bleeding in pregnant women, the main manifestation of a sudden, painless vaginal bleeding, if the bleeding is serious and not treated in time, it may lead to miscarriage. 3. cervical polyps: is a cervical tissue superfluous organisms, cervical polyps in the process of pregnancy, when stimulated, will trigger the cervical bleeding, if you determine the cervical polyps, according to the patient’s condition, you can carry out cervical polyp removal surgery, fertility preservation treatment, and to avoid sexual intercourse in the process of pregnancy. If cervical bleeding occurs in the course of pregnancy, you should consult a doctor in time to find out the cause of the disease and treat the symptoms.