Updated 3 October 2026
At a glance
- The NICHD reports that genetic and environmental factors contribute to PCOS and that its exact cause remains unknown (NICHD).
- Recent research cited by the NICHD suggests 19 possible gene variants that can raise the risk of PCOS, which may explain why features differ from person to person (NICHD).
- A cause-focused file holds four parts: family history, a personal timeline, medicines and pregnancy history, and dated lab results.
- PCOS Journey is a PCOS tracker that keeps cycle dates, symptoms, medicines, and lab results in one dated history, and its insights relate them to the weeks you lived.
Searching for the cause of PCOS usually ends without one answer. Articles list genes, insulin, hormones, and family patterns, and each visit asks for the same background again: who in the family had what, when your periods changed, what you took, and which blood tests were done.
This guide summarizes what major health sources say about causes, then shows how to file the history those causes point to. Each part has fields to fill in, a way to handle gaps, and the questions to take to a clinician.
What research says about the causes of PCOS
The NHS reaches the same position and adds that the cause may involve hormones such as insulin and testosterone not working properly (NHS). The NHS page, last reviewed on 30 June 2026, uses the name polyendocrine metabolic ovarian syndrome (PMOS) and notes that it used to be called PCOS. This guide uses PCOS, the name most people search for.
The NICHD describes three findings that matter for records. Recent research suggests 19 possible gene variants can increase a person's risk of developing PCOS, and these variants could explain why features differ between people. Hormones form the second finding: when cells respond poorly to insulin, the body makes more insulin, and to balance it the body makes more androgens. (Source: nichd.nih.gov.) Subtypes form the third: NICHD-funded researchers described a reproductive subtype with higher reproductive hormone levels and a metabolic subtype with higher body mass index, insulin, and glucose levels. (Source: nichd.nih.gov.)
Each finding corresponds to a part of the file:
| Research area | Part of your file |
|---|---|
| Genes and family patterns | Family history table |
| Insulin and glucose | Glucose, HbA1c, and lipid results with dates |
| Androgens | Testosterone results, plus dated notes on acne, hair growth, and hair loss |
| Cycle and ovulation | Period start dates and gaps since the first period |
| Subtype | A dated list of which features appear most, shared with your clinician |
In PCOS Journey, the Daily check-in records symptoms, mood, sleep, nutrition, exercise, and medicines in one pass, so each row of the table above has a matching dated entry. The Daily Journal holds the questions this section raises, such as which relatives to ask and which results to request. Insights can relate skin, energy, and cycle weeks to the meals, sleep, and treatment changes logged around them.
Family history to file for PCOS: relatives, conditions, and ages
The WHO says that when making a PCOS diagnosis, health workers consider genetic risk factors since women with a family history of PCOS or type 2 diabetes are at higher risk of PCOS (WHO). The NHS lists having a close relative with the condition, or an Asian background, among the reasons someone may be more likely to have it (NHS).
Build one table with a row per relative. Write "unknown" where you do not know, since an honest blank is more useful than a guess.
Family history to file
PCOS Journey lists relatives, conditions and ages.
| Relative | Condition to ask about | Age at diagnosis or first signs | Who told you |
|---|---|---|---|
| Mother, sisters, daughters | PCOS, irregular or absent periods, trouble getting pregnant | Approximate age is enough | Relative or older records |
| Any parent or grandparent | Type 2 diabetes, high blood sugar, high blood pressure in pregnancy | Year or age | Relative |
| Father's side | Diabetes, early heart disease, excess hair or early hair loss | Year or age | Relative |
The 2023 International Evidence-based Guideline for PCOS states that adults and adolescents with PCOS and their first-degree relatives should be aware of the increased risk of diabetes and the need for regular glycemic assessment (Teede et al., 2023), which makes diabetes in the family a line worth completing. Ask relatives one question at a time and date each answer. Many relatives had symptoms filed under other names, such as "irregular cycles" or "trouble conceiving", so ask with those words.
In PCOS Journey, the Daily Journal accepts typed or voice notes, so a phone call with a relative can be recorded the same day with the date attached. Each relative's detail then sits in the history once, in the words you heard. A condition that repeats across several relatives appears as a pattern when you review the notes before the visit.
Personal timeline to file for PCOS: first period, cycle changes, and symptom onset
The NHS says PMOS symptoms usually start in girls and young women under the age of 18, at puberty, and continue until menopause (NHS). NICHD-funded work on genetic clusters found that one cluster, labeled hormonal and menstrual cycle changes, had an increased age at first menstruation (NICHD), which makes the age at the first period a useful first entry.
Personal timeline, by PCOS Journey
| Timeline point | What to write | If you do not remember |
|---|---|---|
| First period | Age or year, and how regular the first year was | Write the school year and ask a relative |
| Cycle changes | Year periods became far apart, very frequent, or heavy | Write the stretch of years and mark it approximate |
| Skin and hair | Year of first acne, new hair growth, or scalp thinning | Use photos with dates in the phone library |
| Weight changes | Year and direction of major changes, plus major life events | Use clinic weights from old records |
| Contraception | Name, start date, and stop date for each method | Ask the pharmacy or prescriber for the list |
The 2023 guideline adds a reason to record the first years carefully: irregular cycles are normal in the first year after the first period as part of the pubertal transition (Teede et al., 2023). Write the year the pattern changed as well as the current pattern. The guide how to start tracking PCOS covers the first week of daily entries.
In PCOS Journey, the Period Tracker keeps start and stop dates, flow, and how heavy bleeding felt from today onward, which continues the timeline in the same format. Past events go in the Daily Journal with the label "timeline" and an approximate date. The two together give one sequence from the first period to the latest cycle, and reading old and new entries together can show whether recent cycles resemble an earlier stretch.
Medicines, contraception, and pregnancy history to file for PCOS
The WHO says combined oral contraceptive pills can help regulate the menstrual cycle and may reduce acne or excess facial and body hair (WHO). Cycle entries logged during a pill year reflect the medicine, so each entry needs the medicine period recorded with it. Cover supplements and over-the-counter products as well.
Use one line per medicine: name, reason given by the prescriber, start date, stop date, and what changed afterward in cycle, skin, hair, or energy. Any change to a medicine belongs to the prescribing clinician, so note the prescriber's name on each line.
Pregnancy history belongs in the same file. The WHO lists gestational diabetes and high blood pressure in pregnancy among the conditions for which women with PCOS have an increased risk (WHO). For each pregnancy, write the year, the outcome, any gestational diabetes or high blood pressure, and any medicines used. Include early losses if you choose to.
From PCOS Journey (by Health Journey Labs), we recommend adding one line to each medicine entry that says what you hoped it would change, because the answer shows later whether that target moved. The related guide how to prepare for a short PCOS doctor visit covers how to present this list in a short appointment.
In PCOS Journey, My Meds stores medicine names and timing as advised, with a date on every start and stop. Each date marks a point where cycle length, skin, and energy can be compared before and after. Over several changes, the entries reveal a pattern of which shifts followed a medicine change and which came first.
PCOS lab results to file: testosterone, glucose, and lipids
The 2023 guideline states that healthcare professionals should use total and free testosterone to assess biochemical hyperandrogenism in the diagnosis of PCOS (Teede et al., 2023). It recommends the 75-g oral glucose tolerance test (OGTT) as the most accurate test to assess glycemic status in PCOS, and a lipid profile at diagnosis. The WHO says women newly diagnosed with PCOS are recommended to have additional blood testing to evaluate for underlying insulin resistance and to assess overall cardiovascular risk (WHO).
| Group | Names that appear on reports | Where to look in the history |
|---|---|---|
| Androgens | Total testosterone, free testosterone, free androgen index | Acne, hair growth, and hair loss notes from the same weeks |
| Glucose and insulin | OGTT, fasting glucose, HbA1c | Energy dips and hunger notes after meals |
| Lipids | Total cholesterol, LDL, HDL, triglycerides | Repeat dates, since a clinician sets the interval |
| Other tests ordered | Thyroid, prolactin, ultrasound reports | Dates and the clinician's reason |
Checklist of lab entry fields, by PCOS Journey
- Date drawn and the name of the lab or clinic
- Test name exactly as printed, with the value and unit
- Reference range printed on the report
- Fasting or not, and the day of the cycle or bleeding status
- Who ordered it and what the clinician said about it
Keep each original report as a photo or PDF with the draw date in its file name. For the week-by-week side of this record, see how to track PCOS labs with cycle and energy weeks.
In PCOS Journey, My Labs stores result dates for androgens, glucose or HbA1c, lipids, thyroid, and other tests that were ordered. Insights can weigh each result against the symptoms and energy of the weeks around the draw date, which shows whether a number matched how those weeks felt.
PCOS symptom onset and speed of change to file
The WHO says symptoms of PCOS can differ from person to person and that an individual's symptoms may change over time (WHO). The NHS lists irregular periods or long gaps between periods, excessive hair growth or hair loss, weight gain, difficulty getting pregnant, depression or anxiety, oily skin and acne, feeling very tired, and dark skin patches among the main symptoms (NHS). For each symptom you have, file the date it was first noticed, how fast it changed, and its current level.
Speed of change deserves its own column. The 2023 guideline states that the clinical history of time of onset and rapid progression of symptoms is critical in assessing for an androgen-secreting tumor (Teede et al., 2023). A fast change in hair growth, voice, or skin, or a symptom that escalates over weeks, belongs in front of a clinician promptly, and the dated onset note supplies the timeline.
Table of symptom onset and change, by PCOS Journey
| Symptom | First noticed | Speed of change | Current level |
|---|---|---|---|
| Hair growth or loss | Month and year | Over years, months, or weeks | Area and 0–10 distress |
| Acne | Month and year | Steady, cyclic, or sudden | Location and count |
| Fatigue | Month and year | Gradual or abrupt | Energy 0–10 |
| Mood | Month and year | Tied to cycle weeks or not | Low mood and anxiety 0–10 |
In PCOS Journey, the Flare Tracker marks a day clearly worse than usual, which separates a one-off spike from a repeating pattern in the history. The Daily check-in adds the baseline level of each symptom on the other days. A pattern of marks in the same cycle weeks, or a sudden cluster, gives your clinician an exact start date and a count of the days that followed.
Bring the file to the visit: questions about PCOS causes and subtypes
A cause-focused visit works best with a one-page summary and four or five questions. The one-page summary lists the family table, the timeline in six lines, the medicine list, the latest lab results with dates, and the symptoms with onset dates.
Questions to write and bring:
Questions about causes and subtypes, by PCOS Journey
- Which other causes of my symptoms were checked, and which results show that?
- Do my results point toward the reproductive or the metabolic pattern that NICHD-funded researchers describe?
- Does my family history change which tests you order or how often?
- Which results should be repeated, and on what dates?
- Which changes in my symptoms should I report between visits, and how?
The WHO says PCOS is diagnosed by the presence of at least two of three features once other causes for the symptoms have been excluded (WHO). Asking which features your results already show gives the visit a clear starting point. Ask the clinician to correct any entry that is out of date.
In PCOS Journey, My Care Team stores each clinician and short visit notes, so the questions above can be written before the visit and the answers added after it. The Doctor Report exports a one-page summary from the logged history, which gives the clinician the timeline and recent weeks at the start of the appointment. Reviewing questions and answers from several visits together shows a pattern of which topics stayed unresolved.
How PCOS Journey can help
A notebook or a folder of PDFs can hold this file. The harder step is relating lab dates, medicine changes, and symptom onset across several years, and keeping relatives' answers where they can be found again. A dated history that already holds cycle dates, symptoms, medicines, and lab results makes that comparison quicker. For a comparison of trackers, see Best PCOS Apps 2026: Trackers Compared.
PCOS Journey is a personal PCOS tracker from Health Journey Labs on the App Store and Google Play. On this angle, it lets you file lab dates, medicine changes, cycle dates, and symptom onset on one timeline, with free-text notes for family history. Below is what you can use and how each part helps.
- Daily check-in — A short guided pass across symptoms, mood, nutrition, sleep, exercise, meds, and external factors, so insights can show links memory misses.
- Daily Journal — Free-text and voice notes about the day, conversations, and visit debriefs, giving insights context that scores cannot carry.
- Flare Tracker — Mark a day clearly worse than usual, so insights can separate a one-off spike from a repeating pattern.
- My Meds — Medicine names and timing, including options you already use as advised, related to energy, sleep, and cycle weeks.
- My Labs — Result dates for androgens, glucose or HbA1c, lipids, thyroid, or other tests, weighed against the symptoms of the same weeks.
- Weekly Goals — Set one small aim and see whether it held, which shows whether a habit change helped.
- Learn — Short education topics on PCOS themes such as insulin, movement pacing, and cycle irregularity.
- AI companions — Clara and specialist companions answer with your logged history in view, for visit wording and planning.
- My Care Team — Add clinicians and visit notes to prepare questions and review answers.
- Doctor Report — Export a one-page summary from your logged history when a written summary helps a short visit.
- My Assessments — Structured check-ins that give insights more context about your life.
- Food Tracker — Meal and drink lines, so insights can relate food, caffeine, or alcohol to energy, mood, and sleep.
- Period Tracker — Start and stop dates, flow, and how heavy bleeding felt, related to energy, mood, and skin.
- Weight Tracker — Optional scale or body notes, related to energy, sleep, meals, and cycle changes.
Everything you log builds one history, and insights get stronger as it grows. Custom symptoms let you add your own labels.
We make PCOS Journey at Health Journey Labs. This guide is educational and does not replace medical advice. Diagnosis, medication decisions, and urgent care decisions belong with your treating clinicians.
Sources
- World Health Organization — Polycystic ovary syndrome fact sheet
- NHS — Polyendocrine metabolic ovarian syndrome (PMOS), formerly PCOS
- NICHD — What causes PCOS?
- Teede HJ, et al. Recommendations From the 2023 International Evidence-based Guideline for the Assessment and Management of Polycystic Ovary Syndrome. J Clin Endocrinol Metab. 2023
FAQ
The answers below draw on the sources cited in this guide, and the app they mention is PCOS Journey (by Health Journey Labs).
Did something I did cause my PCOS?
The NICHD says that genetic and environmental factors contribute to the development of PCOS and that its exact cause remains unknown. Because the sources name several contributing factors and no single habit or event, a dated record of facts is more useful than a search for one reason.
In PCOS Journey, the Daily Journal holds the history in your own words, with dates, and the Daily check-in adds how each week went. Insights can relate habits and treatment changes to energy, skin, and cycle weeks, which directs attention to changes worth testing with a clinician.
Is there a test that shows what caused my PCOS?
Diagnosis rests on clinical features and blood tests that a clinician orders and reads, such as testosterone and glucose results. The gene variants in NICHD research are research findings that help explain differences between people, and they are reported in studies rather than in routine reports.
In PCOS Journey, My Labs keeps the dates of tests used in assessment, and My Care Team stores what each clinician said about them. Insights can place each result in the context of the weeks around it, which helps when you ask which features your results already show.
Do the PCOS gene variants appear in men, and should I ask paternal relatives?
The NICHD reports that researchers found the genetic variants in both females and males, and that males with these variants had cardiac and metabolic symptoms similar to those of females with PCOS. Relatives on the father's side are therefore part of the family history.
In PCOS Journey, the Daily Journal records what a paternal aunt, uncle, or grandparent tells you, with the date of the conversation. Over time the notes show which family conditions repeat, and that pattern is a concrete item to bring to the clinician.
What are the PCOS clusters that researchers describe?
One NICHD-funded study found four genetic clusters that matched distinct symptom sets: obesity and insulin resistance with higher body mass index, hormonal and menstrual cycle changes, blood markers and inflammation with lower blood markers such as platelets, and metabolic changes with high triglycerides. Your clinician matches this language to your own results.
With PCOS Journey, My Labs holds your androgen, glucose, and lipid results, and the Daily check-in holds energy, skin, and cycle symptoms. Insights can show which group of features appears more often across months, which gives the cluster question concrete material.
Why do dark patches on the neck or armpits appear with PCOS?
The NICHD says high insulin levels are linked to a skin condition called acanthosis nigricans, which results in thickened, dark, velvety patches of skin. The NHS lists these patches among the main symptoms. Photograph them monthly in the same light and write the date.
In PCOS Journey, the Daily Journal stores a dated note for each photo, and My Labs stores glucose and HbA1c results. Insights can compare the dates of skin changes with lab dates, which gives the clinician both facts when insulin is discussed.
Does diabetes in my family matter for PCOS?
The 2023 guideline states that women with type 1 and type 2 diabetes have an increased risk of PCOS, and that screening should be considered in individuals with diabetes. A family table with ages makes that history quick to read.
In PCOS Journey, the Daily Journal stores each relative's answer with a date. When a clinician asks about glucose testing, My Labs shows when your last result was recorded, which makes the next date easier to plan.
Could relatives have had PCOS without a diagnosis?
The WHO estimates that PCOS affects 10–13% of reproductive-aged women and that up to 70% of women with PCOS worldwide do not know they have it. A relative may therefore have lived with long gaps between periods, hair changes, or trouble getting pregnant without hearing the name.
In PCOS Journey, the Daily Journal records the symptoms relatives describe in their own words. Those entries sit in the same history as your cycle dates, so a clinician can read the family description and your record together.
How do I file records when the name changed from PCOS to PMOS?
The NHS now uses polyendocrine metabolic ovarian syndrome (PMOS) and states that it used to be called PCOS. Older reports, referral letters, and lab forms still say PCOS, so write both names on the cover page of your file and file each document under its original wording.
In PCOS Journey, dated entries stay in one history regardless of the name on a report. The Doctor Report exports a one-page summary, and a clinician reads the same timeline whichever name the visit uses.
How do I get copies of old lab results?
Ask the clinic or lab that ordered the test for a copy, or open the patient portal if one exists. Request the report itself, with the reference range printed on it, and save it under a file name that starts with the draw date.
With PCOS Journey, My Labs records the date and result with the symptoms logged that week. When a clinician asks how a past result related to how you felt, the history answers with dates instead of memory.
Why does the visit ask about pregnancy history for a cause question?
The WHO says women with PCOS can be supported to become pregnant but generally have higher risk of pregnancy complications that warrants additional monitoring. A clinician uses pregnancy history to decide what monitoring fits.
In PCOS Journey, pregnancy outcomes and any glucose or blood pressure findings go into the Daily Journal with the year, and My Labs stores related results. A clinician then sees the whole sequence from cycle to pregnancy to later labs.
Do my PCOS symptoms change over time, and how do I show it?
The WHO describes PCOS as a chronic metabolic condition that persists beyond the reproductive years, and the NHS says that after menopause some symptoms will stop or may change. Date every new symptom and every symptom that fades.
In PCOS Journey, the Flare Tracker marks days clearly worse than usual, and the Daily check-in records the baseline. Insights can show whether marks became more or less frequent over seasons, which gives you evidence for a treatment review.
Which other health conditions should I file alongside PCOS?
The WHO lists type 2 diabetes, hypertension, high cholesterol, cardiovascular disease, obesity, sleep apnea, metabolic steatohepatitis, and endometrial hyperplasia or endometrial cancer among the conditions for which women with PCOS have an increased risk. File any you have been told about, with the date and the clinician who named it.
In PCOS Journey, My Care Team lists the clinicians who manage each condition, and My Meds lists the medicines tied to them. A dated record of who treats what lets a new clinician see the full picture without asking the same questions again.
Should mood and anxiety go into the cause file?
The 2023 guideline recommends that clinicians screen for depression in all adults and adolescents with PCOS and for anxiety in all adults with PCOS, using regionally validated screening tools. Write the date mood or anxiety changed, what was happening in the cycle, and any result from a screening questionnaire.
In PCOS Journey, the Daily check-in records mood and anxiety on a scale each day, and the Daily Journal holds the context. Insights can relate low-mood days to cycle weeks, sleep, and treatment changes, which gives the screening conversation dated material.
What should I do if the appointment is months away?
Fill the family table, write the six-line timeline, list medicines and pregnancies, and collect lab reports with their dates. Add daily entries for energy, cycle, skin, and mood so the file includes recent weeks.
In PCOS Journey, the Daily check-in takes a few minutes per day, and the Period Tracker adds start and stop dates. By the visit date the Doctor Report summarizes what was logged, so the wait produces a ready record.
How much privacy does my symptom record need?
Notes on periods, hair growth and fertility feel exposed on a shared phone. Lock it and bring only the cycle summary.
Entries you add to PCOS Journey are your own health notes. Check the app's privacy policy for how data is stored and handled. Nothing in this article is medical advice.