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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.
Brownish discharge that occurs in small amounts is likely bleeding, explain Heidi Murkoff and Sharon Mazel in their book, What To Expect When You're Expecting.. Other normal discharge colors during pregnancy include white and yellow, either of which might look brown or tan when dry, particularly in small amounts.