The limits of normal menstrual bleeding are as follows:

It happens every 24 to 35 days, on average every 28 days.

It lasts for at least 1 day and at most 7 days, on average 4-5 days.

There should be a maximum of 4 pads of bleeding from normal pads per day (maximum 80 ml).

This means that the normal menstrual cycle has “limits”. If a woman menstruates for 3 days one month and 6 days the next, both are within normal limits. A woman with 25 days between periods is healthy, and a woman with 32 days between periods is healthy. When these limits are exceeded, menstrual irregularity is mentioned and the causes should be investigated.