Cycle basics
The four phases of your cycle, gently explained
A simple guide to the menstrual, follicular, ovulatory, and luteal phases, and why each cycle can feel different.
Your menstrual cycle is more than the days you bleed. It is a repeating rhythm shaped by changing hormones, and it can influence how you feel throughout the month.
Cycles vary from person to person and from month to month. Think of the phases below as a useful map, not a set of rules your body must follow.
1. The menstrual phase
The first day of bleeding is counted as day one of a new cycle. Estrogen and progesterone are relatively low, and the lining of the uterus is shed.
You might notice cramps, tiredness, lower energy, or a desire for more quiet. Some people feel very little change. Both experiences can be normal.
2. The follicular phase
At the same time menstruation begins, the ovaries start preparing follicles. One may eventually release an egg. Estrogen usually rises as this phase continues.
Some people notice more energy, a lighter mood, or changes in cervical mucus. The length of this phase can vary and often accounts for differences in total cycle length.
3. Ovulation
Ovulation is when an ovary releases an egg. It does not always happen on day 14, and its timing can change between cycles.
Possible signs include clear or slippery cervical mucus, a small rise in basal body temperature after ovulation, or mild one-sided discomfort. These signs are not equally noticeable for everyone.
4. The luteal phase
After ovulation, progesterone typically rises to support the uterine lining. If pregnancy does not occur, estrogen and progesterone fall and the next period begins.
Changes in mood, sleep, appetite, breast tenderness, skin, or energy may appear during this phase. Tracking them can help you distinguish an occasional difficult day from a recurring pattern.
A cycle tracker can help you notice patterns, but its predictions are estimates, not a diagnosis or a method of birth control.
Start with curiosity
You do not need to record everything. A period start date and one or two experiences you care about can be enough to begin. Over time, those small check-ins can create a clearer picture of your rhythm.
If you experience severe pain, very heavy bleeding, bleeding between periods, or a persistent change that worries you, speak with a qualified healthcare professional.
Ready to notice your own rhythm without the noise? Meet Flowy, the privacy-first period tracking app.