A member asked:

Taking birth control; had 1st really heavy period in over a year last month; brownish bleeding has started 4 days before period is due; causes?

A doctor has provided 1 answer

Breakthrough : Probably a breakthrough bleeding you had for some reason such as not taking bcp at the same time of the day , etc. and this breakthrough bleeding brought left over old menstrual blood out of the uterus. The brownish color comes from being old blood left in the uterus from the previous menstruation.

Answered 9/13/2018

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