The cost of liquid-based cytology is about 250-300 dollars in clinical practice. It is best to have the test within 3-7 days after menstruation, because the discharge from the cervical canal is less at this time, which will result in a satisfactory level of exfoliated cells when the specimen is taken. No intercourse, vaginal plugs or vaginal douching should be done before the specimen is taken to avoid affecting the test results. It is also recommended that the liquid-based cytology test be done at the same time as the HPV test to analyze the two together. For example, HPV is the cause of cervical cancer, and the liquid-based cytology test is to check for lesions in the cervical epithelium. So, there are both causes and results. A comprehensive examination and integrated analysis is necessary to understand the true condition of the cervical epithelium.