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Menstruation & Your Cycle
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Added December 15, 2011
Is this normal? Figure out what is normal for you
When you first start menstruating, the length of your period won't be regular—it could last one day or ten days. The average length of a period is 5–7 days.
When you first start to menstruate, the cycle could be very irregular; starting, stopping, and starting again. For example, you could have one period and then wait as long as six months for the next one! This isn't unusual. Until your body adjusts to your cycle, your period may be unpredictable. But after that, your menstrual cycle should be fairly regular during most of your menstruating years. If your period continues to be very irregular, you should see your doctor. The length of time between periods can be anywhere from 21–35 days.
Use the period predictor to learn more about your individual cycle:
How long is your menstrual cycle*?
Wondering how long should a period last? Get answers, tips, and advice from BeingGirl.