A colposcopy usually involves a blood draw in advance to rule out infectious diseases and other illnesses; if a colposcopic biopsy is to be performed, tests such as coagulation tests are usually required as well. Colposcopy is performed by dilating the vagina with a speculum to expose the cervix, and then using a colposcopic probe to look at the cervix for lesions. Blood is usually drawn for infectious diseases before the examination to avoid cross-infection. If a tissue biopsy is required, more often than not, tests such as coagulation are also required to clarify whether the patient is able to undergo a biopsy. If a woman needs colposcopy, it is recommended that she consult a doctor in a timely manner, under the guidance of the doctor, to improve the relevant examinations, to clarify the cause of the disease, and to target the treatment.