Cycle health, body literacy & data privacy
Evidence-based guides to understanding your menstrual cycle, interpreting your own symptoms, and keeping sensitive reproductive health data safe from third-party trackers.
The Four Phases of the Menstrual Cycle
How the cycle is counted, typical phase lengths, what changes in each phase, and when irregular bleeding is worth a doctor visit.
Read full guideAll Guides & Resources
Organised by application: lifestyle, medical visits, data safety, and choosing software.
Exercise by Cycle Phase
What the clinical research shows so far, sample activity for each phase, and how to adjust for cramps, heavy bleeding, or PMS.
How to Prepare Your Cycle Records for a Doctor Visit
What to record, how to summarise three months, a sample summary template, and red-flag symptoms that need prompt care.
Is a Period Tracker Safe for Your Health Data?
What period apps collect, the risks to check for, how to read Apple and Google privacy nutrition labels, and a step-by-step audit.
How to Choose a Period Tracker
A feature checklist, how to test a free trial, how to judge prediction accuracy over three cycles, and an objective scoring worksheet.
How to Calculate Your Menstrual Cycle Length
A step-by-step method to count your cycle length from day 1, what clinical ranges (21–35 days) mean, and how to read cycle variability.
Cervical Mucus Stages and Ovulation Signs
How rising estrogen transforms cervical fluid into stretchy raw-egg-white mucus, how to check it, and how to spot your peak fertile window.
PMS vs PMDD: Differences, Severe Symptoms & Tracking
How to distinguish standard PMS from Premenstrual Dysphoric Disorder, DSM-5 diagnostic rules, biological causes, and prospective daily charting.
Basal Body Temperature: How to Chart & Confirm Ovulation
A step-by-step clinical guide to morning temperature shifts, drawing coverlines, the 3-high rule, and pairing BBT with cervical fluid.