Maybe: Changes in menstrual bleeding can signal a hormonal imbalance (like pcos), uterine structural problems like a polyp or a fibroids, or even pregnancy. In adults, normal menstrual periods vary from about 21-35 days (counting from the beginning of 1 period to the beginning of the next), and last 7 days or less. See your doctor to find out why.
Answered 11/25/2014
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