Articles tagged

Cycle

7 articles. Plain-language guides, sourced, and never a diagnosis.

Latest guide

GuidesSeptember 16, 2026 5 min read

What the luteal phase does to your sleep — and what a wearable actually measures

Warmer nights, more waking, a resting pulse a few beats higher, a recovery score that dips every month. The luteal phase changes sleep in measurable ways. What the research shows, why wearables misread it, and how to read sleep in the context of your cycle.

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The cycle calendar for September 2026 with the logged period, the fertile window and a predicted period drawn with its confidence band — Cycle calendar · example data

GuidesSeptember 16, 2026 5 min read

Perimenopause or something else? What to track before you ask your doctor

Cycles getting shorter, then longer, then skipping; sleep and mood changing; a hot flush or two. Perimenopause is one explanation, not the only one — and clinicians identify it from your history, not one hormone test. What to track before the appointment.

GuidesSeptember 16, 2026 5 min read

What a period app should promise about your data — and how to check that it does

Most health apps are not covered by medical privacy law, two period trackers have settled with the FTC over sharing data, and after Dobbs, cycle data can be legally sensitive. The seven promises to look for, in plain language, and how to check each one.

How it worksSeptember 15, 2026 5 min read

Your cycle changes your metabolism. Why almost no app reads them together

Insulin sensitivity, appetite, glucose and energy all shift across the menstrual cycle. Here is what the research says, why single-day scores misread it, and how to read your cycle and your labs in one view.

GuidesSeptember 15, 2026 5 min read

Heavy periods and low ferritin — what your own data can show, and what only a clinician can tell you

Heavy menstrual bleeding is one of the commonest causes of low iron, and it is often under-reported at appointments. Learn what "heavy" means in clinical terms, what a ferritin result does and does not tell you, and how to put both on one page for your doctor.

GuidesSeptember 15, 2026 5 min read

The one page to bring to your doctor — and why most self-tracked data never gets read

Appointments are short and clinicians read in a fixed order — concern, problem list, allergies, medications. Here is how to turn months of tracked data into one page a doctor can use, and how AuraShield generates it for free.

How it worksSeptember 15, 2026 5 min read

Why a period prediction should show how sure it is

Every period app predicts your next period. Almost none tells you how confident it is. Here is how prediction bands work, why they widen three cycles out, and why a calendar anchored to your logged periods beats a textbook 28 days.