A 20-year-old female asked:
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period is abnormally light but it looks like it's mostly dark, old blood. on birth control and take it every day at the same time.

1 doctor answer
Dr. Vahe Yetimyan
51 years experience General Practice
It sounds: like passing old menstrual blood. Take a pregnancy test since your period is lighter than usual. Any change than usual may be a pregnancy and may need to be ruled out.
Answered on May 12, 2015

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Dr. Matthew Wilson
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Depends: I do not have enough information about your health and history to tell you why you're passing old blood. This is likely anovulatory bleeding.

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