the amount of time between the first day of ur period til u get ur period again
the amount of time between the first day of ur period til u get ur period again
Count day 1 as the first day of bleeding. Then count the days, 2, 3, 4, 5, and so on. The next first day of bleeding is the new day 1. Some women, the count is 28 days, for example.
The days between each period