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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.
Brown Period Blood: Normal Menstrual Blood. There are some cases of periods wherein the discharge appears dark brown to almost black in color, specifically when the period cycle is almost over. This is considered normal because this occurs when blood is already old and was not released from the body quickly.hese blood clots vary in color from bright red to dark. Sometimes these clots are released during the heaviest flow of the period. The presence of clots in the flow of your menstruation may make the blood denser or thicker than usual and may appear brownish, hence brown period blood.