It is best to have a laboratory test for TCT and HPV within 3-7 days of menstruation, and it is recommended to have the test once a year. This is because a negative result of cervical cancer screening significantly decreases the chances of developing cervical cancer within 1 year. If the test is done after a long interval, it is possible that the cervical lesion has already occurred and has not been detected in time, so it is recommended to have the corresponding cervical cancer screening test done in a fixed month every year. It is not allowed to have intercourse after cervical cancer screening, but to keep the vulva clean for one week and not to take a bath within one week, mainly because the examination may cause slight damage to the local mucous membrane of the cervix, which may lead to infection once intercourse or bathing.