The delayed menstruation and brown leucorrhea are divided into the following cases: First, if you usually have normal periods and no sex before and after periods, consider that it may be vaginitis caused by germ infection, and you need to go to the hospital for further examination and confirmation of which kind of vaginitis specifically belongs after treatment. If you have normal menstrual disorders and no sex before or after your period, you should consider that it may be a small amount of bleeding caused by menstrual disorders, and that prolonged menstrual disorders can lead to endocrine disorders, which can seriously affect your fertility. If your period is normally normal and you have sex before and after your period and your period is delayed, you should consider the possibility of pregnancy. But the leucorrhea showing brown should be considered a sign of pre-pregnancy miscarriage, it is recommended to go to the hospital for examination in time. If the possibility of pregnancy is ruled out, it is recommended to go to the gynecological examination, it may be the performance of vaginitis.