Quick answer: You can't usefully track hormone levels day to day at home: in perimenopause they swing so much that a single reading says little. What you can track is what those hormones do. Log your cycle dates, rate a short list of symptoms daily, record any MHT (HRT) regimen and changes, and keep the results of blood tests your clinician orders. Over eight to twelve weeks that record shows the pattern far better than any one test.
“Track your hormones” sounds like it should work the way tracking steps or sleep does: a number, every day, trending up or down. For estrogen and progesterone it does not, and least of all in perimenopause, which is exactly when most women start wanting to.
This guide covers what you can and cannot measure, which tests are worth it, and how to build a record that actually tells you something. It is informational, not medical advice.
Why you can’t watch hormone levels like a step count
In a regular cycle, estrogen and progesterone rise and fall in a predictable rhythm, which is why cycle phases exist at all. In perimenopause that rhythm breaks down. Estrogen can spike higher than it did in your thirties one week and drop low the next, and progesterone falls as ovulation becomes less reliable.
The practical consequence: a single hormone reading is a snapshot of one moment in a moving system. A blood test drawn on a calm week can look completely normal in the middle of a rough season. That is why NICE guidance says not to use an FSH test to diagnose perimenopause or menopause in women over 45. Diagnosis rests on your symptoms and how your cycle is changing, which are things you can track.
What you can actually track
Hormones are hard to see directly, but what they do is easy to see if you write it down. Four things make a record that means something:
- Your cycle dates. The first day of each period, every time. Lengthening, shortening, or skipped cycles are one of the clearest signs of the transition. See how to track your menstrual cycle.
- A daily symptom rating. A short, fixed list (sleep, hot flashes or night sweats, mood, energy, joint pain, whatever applies to you), each rated on a simple scale. Ratings show severity trends that yes-or-no ticks hide. The symptom tracking guide goes deep on this.
- Your MHT (HRT) regimen, if you take one. What you take, the dose, how, and when anything changed, so you can line up how you feel against what changed.
- Lab results, when you have them. Keep the numbers from blood tests your clinician orders, with dates, so you can see a marker move over months rather than reading each result alone.
Line those up over eight to twelve weeks and you have something no single test gives you: the pattern.
Which hormone tests help, and which do not
| Test | What it measures | Useful for | Limits |
|---|---|---|---|
| Blood test (FSH, estradiol) | Hormone levels at one moment | Symptoms before 40, unclear cases, specific clinical questions | Swings in perimenopause make one result unreliable for diagnosis over 45 |
| Thyroid, iron, other bloods | TSH, ferritin, and others | Ruling out conditions that mimic perimenopause | Not a hormone-transition test, but often the most useful bloods |
| At-home urine monitors | LH and estrogen and progesterone metabolites | Seeing ovulation and cycle patterns, mainly fertility | Day-to-day swings in perimenopause; cannot confirm or rule it out |
| Saliva tests | Hormone levels in saliva | Not recommended by mainstream menopause bodies | Saliva levels do not reliably reflect blood levels |
The blood tests that most often change what happens next are frequently not sex-hormone tests at all. Thyroid problems, low iron, and anemia can look a lot like perimenopause, and ruling them out is one of the most useful things bloods can do. For runners in particular, see iron and ferritin for female runners.
What the pattern tells you
A good record answers questions a test cannot:
- Is it cyclical? Symptoms that cluster in the days before a period point to the hormonal swings of the late cycle.
- Is it getting worse, better, or just different? Trends over two to three months are far more telling than any one bad week.
- Did something change it? Starting MHT (HRT), changing a dose, sleep, alcohol, training load: a record shows what moved and when.
It also turns a vague appointment into a specific one. “I feel off” becomes “my cycles have shortened to 23 days, and night sweats rate 4 out of 5 most nights in the week before my period.” For how to use it in the room, see preparing for your perimenopause doctor appointment.
What tracking cannot do
- It is not a diagnosis. It is evidence you bring to a clinician.
- It does not rule other things out. Overlapping symptoms are exactly why you still get evaluated.
- Some things should not wait. Very heavy bleeding, bleeding after 12 months without a period, or severe symptoms are a clinical conversation now, not after twelve weeks of logging.
How Phaes handles this
Phaes is built around tracking what hormones do rather than pretending to read them:
- Cycle and symptom tracking anchored to your real cycle, with a short daily check-in that rates how you feel.
- MHT (HRT) tracking for your regimen and every dose change over time.
- Lab tracking for your bloodwork, with a trend chart for each marker.
- A doctor-ready report (with Insights) that pulls your history into one page to take to an appointment.
Cycle, symptom, MHT, and lab tracking are free. Phaes is informational and does not interpret your results or replace your clinician.
The short version
You cannot meaningfully watch your hormone levels day to day, especially in perimenopause. Track what they do instead: cycle dates, a daily symptom rating, your MHT (HRT) regimen, and your lab results. Eight to twelve weeks of that record will tell you, and your doctor, more than any single test.
Frequently asked questions
Can I track my hormone levels at home?
Partly. At-home urine monitors measure hormone breakdown products such as LH and estrogen and progesterone metabolites, and they are built mainly for tracking ovulation and fertility. They can show what a given cycle is doing, but in perimenopause the readings swing widely from day to day, so they cannot confirm or rule out perimenopause. A daily symptom and cycle log is the more useful record for most women.
Is there a blood test for perimenopause?
Not a reliable one for most women. Hormone levels fluctuate so much during perimenopause that one result can look normal in the middle of a rough stretch. UK NICE guidance says not to use an FSH blood test to diagnose perimenopause or menopause in women over 45; diagnosis is based on symptoms and cycle changes. Blood tests are still useful in specific situations, such as symptoms before 40 or ruling out thyroid problems or anemia.
Are saliva hormone tests accurate?
Salivary hormone testing is not recommended by mainstream menopause bodies such as The Menopause Society, because saliva levels do not reliably reflect blood levels and vary with time of day. If you are offered one, ask your clinician what decision the result would change.
What is the best app to track my hormones?
Look for one that tracks what hormones do rather than claiming to read them: cycle dates, a daily symptom rating, your MHT (HRT) regimen if you take it, and your lab results over time, with a report you can take to an appointment. Phaes does all of this, and cycle, symptom, MHT, and lab tracking are free.
How long should I track before seeing my doctor?
Eight to twelve weeks, or two to three cycles, is usually enough for a pattern to show. Do not wait if symptoms are severe, bleeding is very heavy, or bleeding returns after 12 months without a period; those need a clinician sooner.