Likely normal: A cycle length (from the first day of one period to the first day of the next period) of 21 to 35 days is considered normal. Since calendar months are 30-31 days, it is common to have your period on a different calendar day each month. So if you started a period on january 3rd, you could easily get a second period on january 24th, and that would be normal. Cycles less than 21 days aren't normal.
Answered 1/31/2014
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A doctor has provided 1 answer
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