The Rythma Blog
Clear, well-sourced answers about perimenopause — symptoms, patterns, and how to track them.
Perimenopause Supplements: What the Evidence Says
Black cohosh, soy isoflavones, red clover, evening primrose oil and more — what NICE, The Menopause Society, NCCIH and ACOG actually conclude.
Estrogen & Progesterone in Perimenopause, Explained
What estrogen and progesterone actually do in perimenopause, why they swing erratically instead of just declining, and how that drives your symptoms.
What Is HRT? A Plain-English Guide
HRT replaces the estrogen your body makes less of in menopause. A clear guide to types, delivery methods, benefits, and risks from NICE, NHS, ACOG, and more.
Perimenopause and Joint Pain: The Connection
Why joints ache in perimenopause: an estrogen link, a 71% prevalence figure, what the WHI estrogen trial found, and how to tell it apart from arthritis.
How to Prepare for a Perimenopause Doctor Visit
A practical guide to preparing for a perimenopause appointment: what to track, which questions to ask, and how diagnosis works, based on NICE, ACOG, and NHS.
Talking to Your Partner About Perimenopause
How to talk to your partner about perimenopause symptoms, mood, sleep, and intimacy — with clinical guidance from OWH, the NHS, and peer-reviewed data.
Perimenopause at Work: Managing Symptoms
Practical, evidence-based ways to manage perimenopause symptoms at work — hot flashes, brain fog, fatigue, sleep loss — plus what the data and the law say.
Plan Your Life Around Perimenopause Hard Days
A practical guide to planning work, travel, and big events around perimenopause hard days — using patterns, triggers, and small adjustments that hold up.
Perimenopause Tracking Statistics 2026
Diagnosis often relies on symptoms alone, cycles lengthen years before menopause, and most care visits disappoint. 9 verified tracking stats.
How to Read Your Perimenopause Symptom Patterns
Learn to read your perimenopause symptom patterns: what cycle changes mean, how symptoms cluster, and which warning signs to bring to your doctor.
What to Track in Perimenopause (Beyond Your Period)
Periods are only the start. A clinician-informed guide to the perimenopause symptoms worth tracking — sleep, mood, hot flashes, bleeding, and more.
Clue Alternatives for Perimenopause
Looking for a Clue alternative built for perimenopause? A fair comparison of Rythma, Balance, Caria, Perry, and Flo — features, fit, and how to choose.
Flo Alternatives for Perimenopause
Looking for a Flo alternative for perimenopause? A fair comparison of Rythma, Balance, Clue, Caria, Perry, and Natural Cycles — and how to choose.
How to Track an Irregular Cycle in Perimenopause
A practical guide to tracking an irregular perimenopause cycle: what to log, how clinicians stage the transition, and which bleeding changes to flag.
Why Period-Tracking Apps Fail in Perimenopause
Standard period apps predict the next cycle from past ones. Perimenopause breaks that math with skipped ovulation and 7+ day cycle swings. Here's why.
Best Perimenopause Tracking Apps 2026
A fair, factual comparison of the best perimenopause tracking apps in 2026 — Rythma, Balance, Clue, Flo, Natural Cycles, and more — and how to pick.
Heart Palpitations in Perimenopause: Should You Worry?
Palpitations affect 20-40% of perimenopausal women. What causes that fluttering, pounding heartbeat, when it's harmless, and the red flags to never ignore.
Perimenopause Weight Changes, Explained
Why weight shifts to the belly in perimenopause: estrogen, muscle loss, and a slower metabolism — plus what the clinical evidence says actually helps.
Irregular Periods in Perimenopause: What's Normal?
Irregular periods are usually the first sign of perimenopause. Learn what cycle changes are normal, what counts as a red flag, and when to call a doctor.
Perimenopause and Anxiety: Why It Happens
Anxiety rises in perimenopause as estrogen swings. See the SWAN data, why low-anxiety women are most affected, and what NICE recommends.
Perimenopause Fatigue: Why You're So Tired
Fatigue is the most reported perimenopause symptom (83%). Why estrogen shifts, broken sleep, and night sweats drain your energy, and when to see a doctor.
Night Sweats in Perimenopause: Causes and Relief
Why perimenopause causes night sweats, when they peak, how long they last (a median 7.4 years), and relief from the NHS, OWH, and Menopause Society.
Early Signs of Perimenopause in Your 40s
The early signs of perimenopause — irregular periods, broken sleep, mood shifts, hot flashes, brain fog — with figures from NHS, ACOG, NIH and SWAN.
How Long Does Perimenopause Last?
Perimenopause lasts about 4 years on average and 2 to 8 years for most women. Hot flashes alone run a median of 7.4 years. Here's the verified timeline.
Mood Swings in Perimenopause: What's Going On
Why perimenopause brings irritability, tearfulness, and mood swings — the estrogen science, who's most affected, and what NICE and ACOG recommend.
Perimenopause Brain Fog: What It Is and Why It Happens
Perimenopause brain fog is the forgetfulness and mental cloudiness of midlife. Learn what causes it, how common it is, and why it usually eases.
Perimenopause and Sleep: Why You Wake at 3 a.m.
Why perimenopause wakes you in the night: hormones, night sweats, and a lighter brain. Plus what the data says and what actually helps you sleep.
What Is a Hot Flash? Causes, Triggers & Timing
A hot flash is a sudden wave of heat in the upper body lasting 1 to 5 minutes. What causes them, common triggers, and how long they last in perimenopause.
Why Your Cycle Becomes Unpredictable in Perimenopause
Ovulation gets erratic, estrogen swings, and follicles run low — here's the clinical reason perimenopause periods turn irregular, plus what's normal.
Perimenopause vs. Menopause: What's the Difference?
Perimenopause is the transition; menopause is a single day — 12 months after your last period. Here's the difference, with definitions from WHO and NIH.
Perimenopause Symptoms Statistics 2026: 7.4-Year Hot Flashes
Hot flashes last a median 7.4 years, fatigue hits 83% of women, and depression peaks in late perimenopause. 10 verified perimenopause symptom stats.
Welcome to the Rythma Blog
Clear, well-sourced answers about perimenopause symptoms, patterns, and how to track them — from the team behind Rythma.
What Is Perimenopause? Signs, Stages & When It Starts
Perimenopause is the years of hormonal change before your final period. Learn the stages, early signs, and how it differs from menopause.