The 4 phases of the menstrual cycle, explained
The menstrual cycle is usually divided into four phases — menstrual, follicular, ovulatory and luteal — and each brings different changes in the body and in how you feel. This model is a teaching reference: the length of each phase varies a lot from person to person, and there is no single "correct" cycle. Understanding the phases helps you follow your own body with more calm.
Menstrual phase: when the count begins
The menstrual phase is menstruation itself — the first day of bleeding marks day 1 of the cycle. In this phase, the lining of the uterus (endometrium) is shed, and it is common to feel more tired, have mild cramps, or want to slow down. The length of bleeding also varies: a few days for some people, more for others. There is no single number that fits everyone, and differences like these are usually normal.
- Day 1 of the cycle is the first day of actual bleeding.
- Tiredness and mild cramps are common, but intense pain deserves attention.
- The length of the flow varies a lot between people — and that's okay.
Follicular phase and ovulation: more energy nearby
The follicular phase begins together with menstruation and continues after it, while the body prepares an egg to mature (the name comes from the follicle, the structure that holds the egg). Many people report more energy and drive during this period. It leads to ovulation, the moment when the egg is released — usually around the middle of the cycle, but the exact day changes from person to person and from month to month. Near ovulation, some signs may appear, such as a change in vaginal fluid (the mucus becomes clearer and more stretchy).
Luteal phase: the body prepares and starts over
The luteal phase runs from ovulation until the next menstruation. In it, the body prepares for a possible pregnancy, and hormonal changes may bring symptoms known as PMS (premenstrual tension), such as bloating, mood swings or breast tenderness. The intensity varies a lot: some people barely feel it, others notice quite a bit. If there is no pregnancy, the cycle starts over with a new menstruation. Recording how you feel in each phase, over a few months, helps you see your own patterns.
- The luteal phase runs from ovulation to the next menstruation.
- PMS symptoms vary a lot in intensity — from almost nothing to quite noticeable.
- Following along for a few months reveals your patterns, not a fixed rule.
The cycle is not just menstruation. It's a whole month of changes you can follow.
See which phase you're in, in a simple way
In Nuya, you record your flow, symptoms and fluid, and the app shows which phase of the cycle you're likely in, in clear language. It's a map to understand your body — not a diagnosis, and the reading always respects your individual variation.
Download on the App StoreThis content is educational and does not replace evaluation by a health professional. The phases and their duration vary a lot between people; in case of intense pain, unusual bleeding or doubts, see a gynecologist.