Twilune blog https://twilune.com/blog/ Cycle phases, PMS and moods, calm skills and period-app privacy. en Why period predictions are ranges, not dates https://twilune.com/blog/why-period-predictions-are-ranges/ https://twilune.com/blog/why-period-predictions-are-ranges/ Tue, 27 Oct 2026 08:00:00 GMT Cycle length varies from month to month, even in regular cycles. Why period predictions work best as a range, and when irregular periods need a doctor. PMS or PMDD? How to tell the difference https://twilune.com/blog/pms-or-pmdd/ https://twilune.com/blog/pms-or-pmdd/ Tue, 27 Oct 2026 08:00:00 GMT PMS and PMDD share symptoms, but PMDD is more severe and disrupts daily life. Learn the signs, how it is assessed, and what to bring to a doctor. PMS mood swings: what actually helps https://twilune.com/blog/pms-mood-swings-what-helps/ https://twilune.com/blog/pms-mood-swings-what-helps/ Tue, 27 Oct 2026 08:00:00 GMT What can help PMS irritability, low mood and anxiety: exercise, sleep, CBT-style skills, tracking, and when to talk to a doctor. Evidence sorted by strength. Physiological sigh, box breathing and 4-7-8: which one when? https://twilune.com/blog/physiological-sigh-box-breathing-4-7-8/ https://twilune.com/blog/physiological-sigh-box-breathing-4-7-8/ Tue, 27 Oct 2026 08:00:00 GMT Three breathing techniques step by step, which to try for a fast reset, steady focus or winding down, and what research actually shows. Why you feel different in your luteal phase https://twilune.com/blog/luteal-phase-mood/ https://twilune.com/blog/luteal-phase-mood/ Tue, 27 Oct 2026 08:00:00 GMT Why mood can dip in the luteal phase, what research does and does not show, what helps, and when it may be more than PMS. How to support your partner during PMS https://twilune.com/blog/how-to-support-your-partner-during-pms/ https://twilune.com/blog/how-to-support-your-partner-during-pms/ Tue, 27 Oct 2026 08:00:00 GMT A guide for partners: what PMS can feel like, what helps, what to avoid saying, how to ask, and how not to take it personally without dismissing it. How to choose a private period tracker: a checklist https://twilune.com/blog/how-to-choose-a-private-period-tracker/ https://twilune.com/blog/how-to-choose-a-private-period-tracker/ Tue, 27 Oct 2026 08:00:00 GMT A plain checklist for choosing a period tracker that protects your data: storage, accounts, ads and SDKs, privacy policy, export and delete, app lock. The four phases of the menstrual cycle, in plain words https://twilune.com/blog/four-phases-of-the-menstrual-cycle/ https://twilune.com/blog/four-phases-of-the-menstrual-cycle/ Tue, 27 Oct 2026 08:00:00 GMT The four phases of the menstrual cycle, what hormones usually do in each, and how each can feel, without the myths about a fixed day-by-day script. Cycle syncing: what the evidence says https://twilune.com/blog/cycle-syncing-what-the-evidence-says/ https://twilune.com/blog/cycle-syncing-what-the-evidence-says/ Tue, 27 Oct 2026 08:00:00 GMT An honest look at cycle syncing for workouts, food and work: what research supports, what is marketing, and how to use your own patterns instead. 5-4-3-2-1 grounding: how it works and when to use it https://twilune.com/blog/5-4-3-2-1-grounding/ https://twilune.com/blog/5-4-3-2-1-grounding/ Tue, 27 Oct 2026 08:00:00 GMT The 5-4-3-2-1 grounding technique step by step: what to notice with each sense, why it can ease anxiety, easy variations, and when to get more help.