Inclusion Criteria:  Women of childbearing age who are physically and mentally healthy, have regular menstruation and are between 20-45 years old; Women who are evaluated as normal by vaginal microbiome morphological characterization; Women who agree to participate in this study and have signed an informed consent form; Those who have full capacity for civil and legal conduct; The quality of vaginal samples meets the evaluation requirements of this program.  Exclusion Criteria:  The sampling quality of vaginal secretions does not meet the research study requirements; The quality or format of the slide collection of vaginal smears does not meet the requirements; Women with severe physical or mental illness; Users of hormone therapy and antibiotic drugs; Women with insufficient compliance with this study; Women who are participating in other coinciding clinical drug or medical device trials.