Colposcopy is done to check abnormal changes in the cervix. Doctor may use colposcope to guide a biopsy needle to take the sample from the cervix. The colposcope increase the size of the cells of the cervix and vagina. It can be done in the outpatient setting and has no side effects. It can be done on pregnant women as well. This procedure is not at all painful and can be done within minutes.