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The amount of magnetic flux that rises up to the Sun's surface varies with time in a cycle called the solar cycle. This cycle lasts 11 years on average. This cycle is sometimes referred to as the sunspot cycle.
The typical menstrual cycle length is around 28 days long, but everyone is different. Menstrual cycles will not always be the same length, up to a weeks variation from your average cycle is normal.
32 days
average length from trough to trough of 46 months and standard deviation of 16 months.
Standard solar time
One menstrual cycle is the number of days from your first day of period up until your next period - you determine your average menstrual cycle length by figuring out the average of your last six cycles. You can also use mobile phone apps or web sites such as My Monthly Cycle to figure out your average menstrual cycle length for you.
Average menstrual cycle can mean one of two things:The typical menstrual cycle across all female humans: 28 days.The individuals average menstrual cycle, unique to them.
The average length of the day is usually just called "day".
32 days
The first day of your current menstrual cycle (the first day you begin to bleed again) is also your last day of your previous cycle. The average length of the cycle is 28 days. The first day of your current menstrual cycle (the first day you begin to bleed again) is also your last day of your previous cycle. The average length of the cycle is 28 days.
Mean solar time
It's the average length of the "apparent solar day" throughout the year, 24 hours exactly for planet Earth.