Cycle literacy
The same plain-language library the app carries, on the web. Written for households - the person tracking, and anyone helping care for them. Every article names its sources.
Cycle Phases & Hormones
- The Four Key Phases of the Menstrual Cycle
A comprehensive guide to how menstruation, the follicular phase, ovulation, and the luteal phase interact each cycle.
- The Follicular Phase & The Power of Estrogen
How FSH and rising estradiol grow a follicle and rebuild the uterine lining.
- The Luteal Phase: Progesterone and Body Temperature
The role of the corpus luteum in producing progesterone, stabilizing the endometrium, and raising basal temperature.
Fertility & Ovulation
- Understanding Ovulation & The Fertile Window
The science behind the LH surge, egg release, and the biological window of fertility.
Body & Symptoms
- Premenstrual Changes: Why Hormones Shift Your Mood and Body
What researchers think happens in PMS: hormone levels are usually normal, but the brain may be extra sensitive to their rise and fall.
- Why Do Cramps Happen? Prostaglandins and Menstrual Pain
The biological mechanism of dysmenorrhea: uterine muscle contractions driven by prostaglandins, and when to speak with a doctor.
- Cycle Conversations: Talking Between Teens and Parents
How guardians and teens can discuss cycle changes, privacy boundaries, and practical support with confidence.
- PMS vs. Mood Shifts: When to Ask a Clinician
Distinguishing normal hormonal mood fluctuations from persistent symptoms that deserve medical support.
Cycle Patterns & Health
- Cycle Length & Natural Variation: What Is "Normal"?
Why cycles fluctuate naturally, how adolescent and adult variations differ, and what variation means for health.
- First Periods: What to Expect in the First Two Years
Why early cycles take time to find a rhythm, how the body adjusts, and what is completely normal when starting out.
- What 'Irregular' Really Means at 13
Why an unpredictable cycle during puberty is typical biology, not an illness or defect.