Q&A Index

Menstrual Period Length Stats Study

How long does the typical menstrual period last?

We analyzed the duration of menstrual periods of roughly 19000 fertility/ovulation charts on FertilityFriend.com.

This statistical study counted the days of consecutive bleeding or spotting at the start of each cycle.

Histogram

Statistical Summary

The descriptive stats for this sample are:

Sample Size:19933 Charts.
Average:5.15 Days.
Median:5 Days.
Standard Deviation:1.71.

Spotting

We found that 66% of the sample's charts include one or more days of spotting mostly at the end of the period. Further analysis showed that the median number of days of spotting is 1 day.

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