Cycle

Body-literacy content about timing, phases, variability, and why good tracking is about context rather than false precision.

Cycle basics

Menstrual cycle phases, timing, and patterns

Your menstrual cycle is not a fixed schedule. It is a pattern that shifts across time, shaped by hormones, sleep, stress, health, and everyday life.

Cycle at a glance

  • The menstrual cycle is usually described through four phases: menstrual, follicular, ovulatory, and luteal.
  • A typical cycle is often described as 28 days, but natural variation is common.
  • Timing changes matter most when they repeat across cycles, not when one month looks different.

What this means in real life

Understanding your cycle is not about memorizing textbook definitions. It is about noticing when bleeding, energy, mood, sleep, or symptoms start to follow a pattern.

That pattern can help you make sense of a late period, a different cycle length, or a shift in how your body feels, without jumping straight to the worst conclusion.

How tracking helps

Tracking works best when it helps you interpret your own rhythm. A few simple signals, like period timing, symptoms, energy, and sleep, can make your cycle easier to read over time.

How Luna helps

Track patterns with more context, not false precision

Luna helps you log timing, phases, and shifts so predictions stay grounded in your real cycle history.

Articles in Cycle

Understanding cycle phases through real symptoms

A practical guide to recognizing cycle phases through real symptoms, energy, mood, and body signals, without turning your cycle into a textbook.

Late period or just a shift in your cycle?

A grounded guide to what a late period might actually mean, the most common reasons cycle timing shifts, and when it makes sense to speak with a doctor.

What is the follicular phase, really?

A calm, plain-language guide to what the follicular phase is, what tends to change during it, and which shifts are worth tracking versus over-reading.

Irregular cycle tracking apps: how to find predictions that actually work for you

Irregular cycles don't fit standard 28-day predictions. Here's what tracking apps actually do differently, and how multi-signal logging may help.

Late luteal phase symptoms: what your body is doing in the final days before your period

Late luteal phase symptoms cluster in the 5–7 days before your period. Here's what tends to happen, why, and how to spot your own pattern across cycles.

How cycle length actually varies

A practical guide to how cycle length can vary from month to month, what changes are common, and what patterns are more useful than one exact number.

Period predictions are ranges

A practical guide to why period predictions are estimates, why apps guess, and why a range is more honest than one exact date.

Spotting vs period

A practical guide to the difference between spotting and a period, including timing, flow, and what patterns are useful to notice.

What counts as day 1 of your cycle

A practical guide to what counts as day 1 of your cycle, how to think about spotting versus full flow, and why this matters for tracking.

What is a menstrual cycle

A practical guide to what a menstrual cycle actually is, how phases work in real life, and why tracking patterns matters more than memorizing dates.

Why your cycle suddenly becomes irregular

Understand why your cycle can suddenly become irregular, what tends to drive those changes, and how to track patterns without jumping to conclusions.

Related topics

Symptoms

Specific, pattern-aware symptom content tied to real cycle tracking and everyday decisions.

Energy

Practical explanations of energy, mood, focus, movement, and recovery across the cycle, without generic cycle-syncing fluff.

Privacy

Trust-focused content about data boundaries, partner-sharing limits, account deletion, and what privacy-first should actually mean.