The most common cause of vaginal bleeding is due to pre-eclampsia. It is advisable to have an ultrasound examination, combined with blood hCG and progesterone, and then give appropriate treatment to preserve the pregnancy. In case of irregular vaginal bleeding, it is also important to find out if there are local lesions in the cervix. If you did not have the appropriate health check-up before pregnancy and do not know the local condition of the cervix, it is advisable to have a gynecological examination to find out if there are local superfluous organisms in the cervix. If there are cervical polyps or cervical lesions, they can also cause irregular vaginal bleeding, so it is recommended to be screened for cervical cancer if necessary, and if there are polyps, it is recommended to be given an operation to remove them.