Free Period Tracker
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Understanding Your Menstrual Cycle
The four phases of your cycle
Your cycle has four phases — menstruation, the follicular phase, ovulation, and the luteal phase. Understanding each phase helps you predict your mood, energy levels, and fertility throughout the month.
What is a normal cycle length?
A normal menstrual cycle ranges from 21 to 35 days. The average is 28 days, but this varies widely between women and can even change month to month due to stress, diet, exercise, or illness.
Signs of an irregular cycle
Cycles shorter than 21 days or longer than 35 days, very heavy or very light bleeding, periods lasting more than 7 days, or skipped periods can indicate hormonal imbalances. Talk to your doctor if this applies to you.
Tips for accurate tracking
Track for at least 3 months to find your true average cycle length. Note the first day of bleeding each month, any symptoms you experience, and how long your period lasts. The more data you have, the more accurate your predictions become.