The causes of cervical cancer include: The first point is infection by the human papillomavirus (HPV), particularly persistent infection with high-risk types, which is the basic cause of precancerous lesions and cervical cancer. The second point is that DNA from HPV is not detected in the tumor tissues of a minority of cases, especially among some older patients. Epidemiology shows that early childbirth and multiparity are closely related to the occurrence of cervical cancer. With an increasing number of childbirths, the risk of cervical cancer also increases. This correlation might be due to the trauma to the cervix during childbirth and changes to the endocrine and nutritional states during pregnancy.