1 doctor weighed in:

I've always had irregular periods. But for the last few months I've had an extremely light period every 3 weeks. What could cause that?

1 doctor weighed in
Dr. J. Yusuf Erskine
Holistic Medicine

In brief: See your PMD

Regular periods every 21 days is not so unusual, but you should be checked out to see what factors might be contributing to short periods.

In brief: See your PMD

Regular periods every 21 days is not so unusual, but you should be checked out to see what factors might be contributing to short periods.
Dr. J. Yusuf Erskine
Dr. J. Yusuf Erskine
Thank
Get help from a real doctor now
Dr. Jane Van Dis
Board Certified, Obstetrics & Gynecology
15 years in practice
47M people helped
Continue
108,000 doctors available
Read more answers from doctors