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The average menstrual cycle is 28 days - that's from day one of your period up until your next period, but everyone's menstrual cycle is different. It can vary greatly depending on the person and some people have up to 35.

It's best to work out your average menstrual cycles yourself by adding together your last six cycles then dividing by six - as long as your periods fall within a week of your average menstrual cycle length it is considered regular.

The first year you start menstruating your cycles will be very inconsistent and might not come for up to 6 months after your first cycle. this is very common and you should not be worried. also if you have it sooner than 6 months than that is also normal.

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9y ago

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Q: How long is a menstrual cycle?
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