If brown discharge persists and menstruation is delayed, it may be caused by miscarriage with precursor, ectopic pregnancy, gynecological inflammation, endocrine disorders and so on.
If the brown discharge persists and the menstrual period is delayed, it may be caused by pre-menstrual abortion, ectopic pregnancy, gynecological inflammation, endocrine disorders and so on.
Menstruation can be brown at the beginning or near the end of menstruation because the menstrual blood is not discharged in time, and it will be black when it accumulates in the vagina and uterus for a longer period of time.
If your period does not come regularly, you may have a preeclampsia or ectopic pregnancy. Some women who do not have a regular period for a day or two after having a brown discharge need to be examined as soon as possible.
Luteal insufficiency, or other endocrine abnormalities, as well as inflammation of the uterus may lead to the appearance of premenstrual brown discharge.
It is recommended to rule out pregnancy and seek prompt medical attention for brown discharge before menstruation.