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1. Delayed Periods. â A brown vaginal discharge instead of a period usually occurs due to late periods. â Sometimes if the lining is not eliminated, the residual can remain within the uterus for almost a month. â In this condition, a womanâs body expels an old uterine lining.
Although black or brown colored discharge during menstrual flow is fairly common among women, the situation doe not indicate severe disorders. This is because discoloration is commonly a result of the long menstrual period. The long period means that the blood has become oxidized thereby causing the change in color.