A Picture Summary Of The Menstrual Cycle
The menstrual cycle, starts from the first day of one period to the first day of the next period.
The Menstrual cycle isn't the same for every woman.
Menstrual flow may start within every 21 - 35 days of the woman's cycle.
Menstrual flow (how long a woman bleeds) may last from 2 - 7 days.
Cycle length varies from woman to woman.