A member asked:

On bc for yrs, never miss one, always at the same time. this cycle i've had btb w/4 active pills left: red/pink, brn & blk blood: what could cause it?

A doctor has provided 1 answer
Dr. Doyle Huey answered

Specializes in Family Medicine

Break through bleed: Bcp's work in your own bodies hormone system to stop fertilization of an egg or implantation of a fertilized egg. Since your own hormones can be thrown off by many factors (ie. Wt gain or loss, sickness, changes in sleep, changes in exercise level, stress) these can also effect your cycle on birth control.

Answered 5/23/2015

4.1k views

Thank

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