How often does your period supposed to come?

A woman's menstrual cycle averages around 28 days. Not every woman has a 28-day cycle though and not every woman's cycle can be counted exactly the same every month. Some women may only have a 20- or 25-day cycle while others may have 30- or 35- or even 40-day cycles. It depends on the woman's body.

The actual length of time that a woman menstruates (or has her period) is typically around 5 days...although, again, it depends on the woman. Each month may be different with some really heavy months or some really light months.