Cervical cancer in pregnancy not only refers to pregnancy, but also to patients with cervical cancer detected within one year after delivery. This is because these patients actually developed the cancer during pregnancy, but the cancer was not detected earlier or for other reasons. Since cervical cancer mostly occurs in women over 40 years of age with reduced fertility, cervical cancer in combination with pregnancy is less common. The symptoms of pregnancy combined with cervical cancer are the body’s warning signs that the body is nutritionally deficient and the resistance is low, although this condition is relatively rare, it is still important to understand it in general. Symptoms are similar to those of non-pregnancy cervical cancer. Early stages should be distinguished from chronic inflammation of the cervix, cervical erosion and benign papilloma, which are common in pregnancy. Occasional or post-coital vaginal bleeding is common. Because it occurs during pregnancy, it is often misdiagnosed as a result of pre-eclampsia, placenta praevia, placenta abruptio, preterm labor, or cervical dilatation. In the middle to late stages, the signs are more obvious and easily diagnosed. Misdiagnosis is caused by avoidance of vaginal examination due to fear of miscarriage. Subsequent development of the carcinoma may result in increased vaginal discharge and drenching vaginal bleeding. Late stage Pain in the lower back or lateral thighs may occur. The pain is more obvious due to pressure caused by enlargement and shedding of large cancerous tissues in advanced stage. In addition to clinical manifestations and gynecological examination, biopsy or assisted sampling will be performed according to different cases, and the diagnosis will be confirmed by pathological histological examination results. The cytologic changes of cervical carcinoma in situ in pregnancy are more difficult to determine, but the histologic diagnostic criteria are the same as those in non-pregnancy, i.e. intercellular changes are seen in the entire epithelium from the basal layer to the superficial layer. The cervical epithelium in pregnancy can produce various types of morphological changes, which should be distinguished from true interstitial lesions. 1. Increased adenomatous hyperplasia, which may resemble adenocarcinoma and may be mistaken for malignancy. 2. Reserve cell hyperplasia or squamous cell metaplasia may be mistaken for active cancer cell proliferation. 3.Mosaic arrangement of metaplasia may be mistaken for squamous epithelial cell infiltration in the mesenchyme and misdiagnosed as cancer. It can be seen that this type of cancer is more dangerous. Cervical cancer in pregnancy is a common cancer in gynecology, and we should pay close attention to the development of this disease. We should pay close attention to the development of this disease and go to a professional hospital for examination when we find various discomforts in our body.