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Polycystic Ovary Syndrome
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In one pass Polycystic ovary syndrome (PCOS) is one of the most common hormonal conditions in women of reproductive age. Not this — Cutting sugar cures PCOS — Polycystic ovary syndrome runs on two linked problems, insulin resistance and androgens (male-type hormones); cutting sugar addresses only one. What matters is losing 5-10% of body weight, plus myo-inositol.
Educational content, not medical advice — consult a clinician.
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Chapter 1
What PCOS is
Polycystic ovary syndrome () is one of the most common hormonal conditions in women of reproductive age. The name mentions the ovaries, but it reaches well beyond them: periods and ovulation are disrupted, high androgens bring acne and excess hair, and weight, blood glucose and pregnancy can all be affected. The small follicles seen on ultrasound are only its most visible sign.
Many people with PCOS have insulin resistance, often even when they are slim; high insulin pushes androgens up, and in many people this is the most important link in the chain. But it is not the only cause for everyone: genes and the ovary's own hormone production play a part too.
The combined oral contraceptive pill is the first-line medicine for regulating periods and controlling excess hair, but it does not improve insulin resistance, and symptoms often return after stopping it. So managing PCOS usually means looking after both sides: the symptoms and the metabolism.
Many people with PCOS have insulin resistance, often even when they are slim; high insulin pushes androgens up, and in many people this is the most important link in the chain. But it is not the only cause for everyone: genes and the ovary's own hormone production play a part too.
The combined oral contraceptive pill is the first-line medicine for regulating periods and controlling excess hair, but it does not improve insulin resistance, and symptoms often return after stopping it. So managing PCOS usually means looking after both sides: the symptoms and the metabolism.
Clinical · How it is diagnosed and what to test
It is the most common hormonal and metabolic condition in women of reproductive age: the 2023 international guideline (Teede 2023) puts global prevalence at 10–13%. How do doctors decide? With an international consensus known as the Rotterdam criteria: irregular periods (a problem with ovulation), high androgens, and a polycystic appearance of the ovaries. Any two of the three, after ruling out a few conditions that look similar (Cushing syndrome, congenital adrenal hyperplasia, prolactin or thyroid problems, and androgen-secreting tumors), are enough for the diagnosis. When irregular periods and high androgens are both present, the diagnosis already stands and an ultrasound is not needed.The threshold for each criterion: irregular periods generally means (from 3 years after the first period) cycles longer than 35 days or shorter than 21 days, or fewer than 8 periods a year. Some people bleed roughly every month without actually ovulating. High androgens can show up as acne, excess hair (upper lip, jaw, chest and abdomen) or male-pattern hair loss, or as raised testosterone or dehydroepiandrosterone sulfate () on a blood test. Polycystic morphology: the old 2003 Rotterdam threshold was 12 or more small follicles of 2–9 mm in one ovary; the 2023 guideline, allowing for today's ultrasound machines, raised it to 20 or more in one ovary, or an ovarian volume above 10 mL. In adults, anti-Müllerian hormone (AMH) can be used instead of ultrasound to judge polycystic morphology, but AMH cannot be used on its own to make the diagnosis. In teenage girls, polycystic morphology is not used, and neither is AMH: their ovaries naturally contain many follicles and do not settle until 7–8 years after the first period, so an early verdict can mislabel them.
Many people with show measurable insulin resistance (a commonly quoted figure is 70–80%), often even when they are slim. It is linked to higher long-term risks of cardiovascular disease, type 2 diabetes () and endometrial cancer; the contraceptive pill can control periods and excess hair, but it does not improve these metabolic risks.
PCOS looks different in different people, and not everyone has every feature: infrequent or irregular periods; acne and excess hair; weight that is hard to lose, with visceral fat around the belly; difficulty conceiving; dark, thickened skin on the back of the neck or in the armpits (acanthosis nigricans, which often signals insulin resistance); thinning hair; mood swings and anxiety. It is tied on one side to diet, exercise and sleep, and on the other to periods and fertility. The online line that one bottle of supplements can sort out PCOS is one of the claims most in need of untangling.
Tests when PCOS is suspected:
Hormones:
Total testosterone, free testosterone, DHEA-SLuteinizing hormone () and (FSH) (an LH:FSH ratio above 2 is common in PCOS, but it is not a diagnostic criterion)17-hydroxyprogesterone (17-OHP) (to rule out congenital adrenal hyperplasia)Prolactin and thyroid-stimulating hormone () (to rule out high prolactin and thyroid problems)AMH (reflects the ovarian follicle reserve; often high in PCOS)
Metabolic:
Fasting glucose and a 75 g (OGTT) (the 2023 guideline considers it the most accurate test of blood glucose status in PCOS, recommended whatever your weight)Fasting insulin and (the guideline does not recommend relying on these routinely, because the usual methods are inaccurate)A full lipid panel (, , , total cholesterol)Liver function (metabolic dysfunction-associated steatotic liver disease, , often occurs alongside)
Imaging:
Pelvic ultrasound (to look at the ovaries)
Lifestyle questionnaire:
Diet, exercise, sleep, stress, menstrual history and plans for pregnancy
The 4 PCOS phenotypes (derived from the Rotterdam criteria at a 2012 NIH expert workshop): the share of each type varies a lot between populations; the figures below are commonly quoted rough numbers.
Type A (classic): all three criteria, about 50%; the highest metabolic riskType B: ovulation problems plus high androgens, without polycystic morphology; about 25%Type C (high androgens plus polycystic morphology, with regular periods): about 15%; lower metabolic riskType D (ovulation problems plus polycystic morphology, without high androgens): about 10%; lower metabolic risk
What this means clinically: types A and B carry a high metabolic risk, so the focus is on insulin resistance and long-term cardiovascular follow-up; types C and D carry a lower metabolic risk, and the main concerns are periods, fertility, and skin and hair.
I have to take metformin to lose weight needs to be picked apart:
Metformin has randomized-trial evidence for improving ovulation (the Cochrane review by Lord 2003); the 2023 guideline says adults with a of 25 or more can consider it for weight and metabolic measuresLifestyle changes (diet, exercise, 5–10% weight loss) can work as well as metformin alone, or betterMetformin plus lifestyle change is a common combination drugs (semaglutide, liraglutide) can be considered under the same weight-loss drug criteria as for the general population (for example a BMI above 30), alongside continued lifestyle change. Data on their safety in pregnancy are lacking, so whenever pregnancy is possible, effective contraception is needed at the same time; if you plan to become pregnant, talk to your doctor about when to stop
Chapter 2
How insulin drives up androgens
In many people with , the story runs along one line: cells become less responsive to insulin, the pancreas makes more insulin to compensate, and the excess insulin in turn drives up androgens.
High insulin raises androgens by three routes: it directly stimulates the androgen-making theca cells in the ovary and amplifies the effect of ; it lowers the that the liver makes, so more testosterone circulates free; and it nudges the adrenal glands to release a little more. With more androgens come acne and heavier body hair, and follicles stall at 2–9 mm without maturing, so ovulation is held back. The androgens in turn worsen insulin resistance, closing a self-reinforcing loop. The weightiest levers for breaking it are regular exercise and a smaller waist.
High insulin raises androgens by three routes: it directly stimulates the androgen-making theca cells in the ovary and amplifies the effect of ; it lowers the that the liver makes, so more testosterone circulates free; and it nudges the adrenal glands to release a little more. With more androgens come acne and heavier body hair, and follicles stall at 2–9 mm without maturing, so ovulation is held back. The androgens in turn worsen insulin resistance, closing a self-reinforcing loop. The weightiest levers for breaking it are regular exercise and a smaller waist.
Clinical · Spotting and breaking insulin resistance
Many people with show measurable insulin resistance (a commonly quoted figure is 70–80%), pushed along by genes, visceral fat, sitting a lot and a high-sugar diet together. Insulin is normally the key that delivers glucose into cells, mainly opening the locks of muscle, fat and liver. Resistance means the locks have rusted: for the same amount of blood glucose, the pancreas has to make more insulin to turn them.Here are the three routes in a little more detail. One goes straight to the ovary: insulin directly stimulates the theca cells and amplifies (LH) sent by the pituitary gland, and squeezed from both sides, the cells make more testosterone. The second goes through the liver: insulin lowers (SHBG), which normally soaks up testosterone like a sponge; with less sponge, more testosterone is free to act (even if total testosterone barely changes). The third reaches the adrenal glands and nudges them to release a little more androgen (). The high androgens then worsen the resistance, and the two lock into a self-reinforcing loop that is hard to loosen without a push from outside.
There are several levers for breaking the loop, roughly in order of weight: strength training plus high-intensity interval training (), after which muscle is clearly more sensitive to insulin for 24–72 hours; a 5–10% smaller waist, which for people who are slim outside but carry fat inside matters more than the number on the scale; a healthy diet that flattens the insulin peak after meals; metformin (as prescribed); inositol (see How much inositol helps); and drugs, which are powerful but have side effects, need contraception while you take them, and should be stopped in consultation with your doctor before you try to conceive.
One more point, about a common source of self-blame: is PCOS happening because I eat too much sugar? A high-sugar diet is one trigger, but genes, the environment you grew up in and your whole hormonal background also play a part; it is not simply a matter of a sweet tooth. Putting all the blame on sugar tends to bring anxiety around eating and self-reproach, which is exactly the direction to avoid when managing PCOS.
How do you know whether you have insulin resistance? (Not from alone)
First, be clear about one thing: the 2023 international guideline considers the routinely available measures of insulin resistance inaccurate and does not currently recommend using them in clinical practice. The cut-offs below are only a rough reference for reading a lab report.
First:
Fasting glucose (mmol/L) × fasting insulin (μU/mL) / 22.5The fasting insulin it relies on is exactly the test the guideline calls inaccurate in routine use, so no cut-offs are given here, and do not judge yourself on this one number
Second: the 75 g (OGTT)
Glucose and insulin measured fasting, at 1 hour and at 2 hoursMore sensitive than HbA1c: early insulin resistance may leave HbA1c normal while the OGTT is already abnormalLook at 2-hour glucose of 7.8–11 (impaired glucose tolerance, IGT); some also use 1-hour insulin above 60 μU/mL, but that value has no agreed cut-off
Third: HbA1c
< 5.7%: normal5.7–6.4%: prediabetes≥ 6.5%: type 2 diabetes
With PCOS plus insulin resistance, the risks climb (these come from observational studies and are associations):
A lifetime risk of type 2 diabetes about 4–7 times that of the general populationA higher risk of cardiovascular eventsAbout 2–3 times the risk of gestational diabetesAbout 2–3 times the risk of endometrial cancer (long spells without ovulation leave estrogen unopposed by progesterone); the 2023 guideline also notes that the overall chance remains low and routine screening is not recommended
I don't look overweight, so why did the doctor say I have insulin resistance? A few common reasons:
Waist size reflects metabolic risk better than : the International Diabetes Federation (IDF 2006) sets the central-obesity cut-off for Chinese women at a waist of 80 cm or more, and another common standard uses 88 cm. BMI can be normal while the waist is over the limitThe slim-outside, fat-inside build (TOFI: more visceral fat, less fat under the skin) can make BMI look normalThe response is the same either way: strength training, a diet with a low glycemic index (), sleep and a smaller waist, without necessarily lowering BMI
Is PCOS the same as prediabetes? Not quite. PCOS is a syndrome in which hormones and metabolism are intertwined; prediabetes and type 2 diabetes are defined by blood glucose. But PCOS clearly raises the risk of type 2 diabetes, and many patients later develop prediabetes or type 2 diabetes, so long-term monitoring is needed.
idf-2006-metabolic-syndrome-definition
Chapter 3
How much inositol helps
Inositol is a six-carbon sugar alcohol found in citrus, legumes, whole grains and cantaloupe, and inside cells it acts as a second messenger that helps pass the insulin signal along. Two forms come up most often: myo-inositol (MI), linked mainly to and follicle maturation, and found at high concentrations in follicular fluid and the brain; and D-chiro-inositol (DCI), linked mainly to insulin signaling and lowering androgens. Studies have measured a ratio of about 100:1 between the two in the follicular fluid of healthy women, and this ratio is disrupted in .
It is not a miracle cure. The 2023 international guideline's view is that inositol can be considered according to personal preference: harm is minimal and metabolic measures may improve, but the benefit for outcomes such as ovulation, excess hair and weight is limited. A common regimen in trials is 4 g of MI a day in two doses, sometimes with about 100 mg of DCI (roughly 40:1), taking 8–12 weeks to show an effect; the guideline also states that there is not yet enough evidence to recommend any particular form, dose or ratio.
It is not a miracle cure. The 2023 international guideline's view is that inositol can be considered according to personal preference: harm is minimal and metabolic measures may improve, but the benefit for outcomes such as ovulation, excess hair and weight is limited. A common regimen in trials is 4 g of MI a day in two doses, sometimes with about 100 mg of DCI (roughly 40:1), taking 8–12 weeks to show an effect; the guideline also states that there is not yet enough evidence to recommend any particular form, dose or ratio.
Evidence · How much evidence supplements and lifestyle have
How much evidence is there for inositol? Unfer 2017, a , pooled 9 (247 people on inositol, 249 controls). A typical regimen in the trials was 2 g of myo-inositol (MI) twice a day, sometimes with 50 mg of D-chiro-inositol (DCI) twice a day (about 40:1), for 8–24 weeks. Compared with controls, fasting insulin and fell clearly; testosterone showed only a downward trend that did not reach statistical significance; androstenedione did not change; and (SHBG) rose clearly only in trials that lasted at least 24 weeks. This analysis pooled metabolic and hormone measures; ovulation, periods and weight were not among them. Single small trials such as Costantino 2009 and Genazzani 2014 reported results in a similar direction.The 2023 international guideline compares it this way: for excess hair and central fat, metformin should be preferred over inositol, although metformin causes more gut side effects; for infertility, inositol still counts as an experimental therapy, with benefits and risks too uncertain. It is cheap and needs no prescription in North America and Europe, so it can be a helper, but do not make it your only tool; taking inositol while keeping a high-sugar, sedentary routine greatly blunts its effect. Evidence on its safety in pregnancy, and on whether it prevents gestational diabetes (GDM), is still insufficient, so check with your doctor about whether to keep taking it while pregnant. Some suggest that people with more severe insulin resistance (type A) gain more, but direct comparisons are lacking.
Other supplements sold under the banner, one by one: green tea extract, where high-dose carries a risk of liver injury, so drinking green tea itself is a safer way to get any benefit; chromium supplements (see chromium), which rest on the old glucose tolerance factor idea and have no PCOS-specific evidence; chasteberry (Vitex), with limited evidence and unclear interactions with the contraceptive pill and metformin, so not recommended; spearmint tea, where 1–2 small trials showed lower free testosterone, and which is safe and cheap enough to try; N-acetylcysteine (), where a few small trials reported better ovulation, but the certainty of evidence is low and not enough to recommend it yet; and berberine (see berberine), which acts through the pathway much like metformin, but is poorly absorbed and must not be used in pregnancy. Trying to solve PCOS with one product does not work; what holds up better is a combination: lifestyle as the base, metformin or other medicines as your doctor advises, regular monitoring, and inositol as an optional personal choice.
Diet: the Mediterranean pattern versus very low carbohydrate:
The 2023 international guideline concludes that there is no evidence that any one type of diet composition is better than another; any diet that follows general healthy-eating guidance has benefits, and what matters is being able to keep it up.
The Mediterranean pattern:
Base: vegetables, fish, whole grains, olive oil, nuts, a moderate amount of legumesEat less of: red meat, processed meat, refined sugar, trans fatsEvidence in PCOS: small trials have seen improvements in insulin resistance, periods and other measures, but there is no evidence that it beats other healthy dietsThe often-cited Toledo 2011 is a Spanish nested case-control study of women in general, not of women with PCOS: those whose diet was closer to the Mediterranean pattern reported fewer difficulties conceiving; this is an observed associationSustainability: high (not extreme, and flexible)
Very low carbohydrate and ketogenic diets:
Clear short-term effects (on weight and insulin)Hard to keep up long term: most people regain weight within 6–12 monthsSome worry that very low carbohydrate intake strains the stress axis (the axis) and makes periods more irregular; direct evidence for this is lackingSuggestion: if you want to eat low-carb, moderate low-carb (100–150 g of carbohydrate a day) is easier to sustain than ketogenic eating (< 50 g)
Protein 1.2–1.6 g/kg a day:
Supports muscle building, keeps you fuller after meals, and reduces swings in blood glucoseSources: fish, eggs, dairy, legumes, lean meat
Strength training 2–3 times a week:
Directly improves muscle sensitivity to insulinKeeps muscle mass, and with it the metabolic rateProtects lean body mass while losing weight
High-intensity interval training ():
4–8 rounds of 30 seconds all-out, with 30–60 seconds of rest between rounds, 1–2 times a weekImproves insulin sensitivity and maximal oxygen uptake ()
Enough sleep (7–9 hours):
Studies show that one night of less than 5 hours' sleep lowers insulin sensitivity the next day by about 30%Chronic short sleep keeps cortisol raised, which worsens insulin resistance
Managing stress:
Chronic stress keeps the HPA axis switched on, and androgens and insulin resistance rise with itCognitive behavioral therapy, mindfulness, yoga and walking: some evidence of benefit
A 5-step PCOS combination:
1. A 5–10% smaller waist ( does not have to come down)
2. A Mediterranean-style or other healthy diet
3. Strength training 2–3 times a week, HIIT 1–2 times a week
4. Metformin (as prescribed); inositol 4 g/day as an optional personal choice
5. 7–9 hours of sleep and stress management
Effects usually show within 3–6 months (more regular periods, weight loss, less acne). Do not chase speed: losing weight too fast (more than 5% a month) is hard to sustain and may also make periods more irregular.
toledo-2011-dietary-patterns-conceiving
Chapter 4
Trying to conceive, and medicines
People with who want a child follow a ladder set out in the 2023 international guideline (Teede 2023): first spend a few months getting lifestyle and weight on track; if ovulation still does not return, use ovulation-inducing medicine, with letrozole as the first choice; only if that fails move on to intrauterine insemination or IVF. Many people conceive along this ladder, and some conceive naturally.
weight-loss drugs (semaglutide, liraglutide and others) can be considered under the same weight-loss criteria as for the general population, but data on their safety in pregnancy are lacking, and animal studies have shown harm to embryos. So while taking them, use effective contraception whenever pregnancy is possible, and if you plan to become pregnant, ask your doctor how far ahead to stop.
weight-loss drugs (semaglutide, liraglutide and others) can be considered under the same weight-loss criteria as for the general population, but data on their safety in pregnancy are lacking, and animal studies have shown harm to embryos. So while taking them, use effective contraception whenever pregnancy is possible, and if you plan to become pregnant, ask your doctor how far ahead to stop.
In practice · Three steps to pregnancy, then follow-up
Step one: spend 3–6 months getting your lifestyle on track. If you are overweight, bring your waist down by 5–10%; eat a healthy diet (the Mediterranean pattern is one common choice), get enough protein and add strength training; stop drinking and smoking, and keep caffeine under 200 mg a day; take folic acid 400–800 μg (with a above 30, the 2023 guideline advises a higher dose, so ask your doctor how much) and vitamin D 1000–2000 ; and track whether you ovulate with basal body temperature, ovulation test strips or a cycle app. Inositol can be added if you wish, but the 2023 guideline still treats its use for infertility as experimental. A commonly quoted estimate is that this step alone lets 30–50% of people conceive naturally within 6 months.Step two: if ovulation still does not return, use ovulation-inducing medicine. The first choice is letrozole, which has replaced the older drug clomiphene as first-line for (a trial by Legro 2014, published in NEJM), with higher ovulation and live-birth rates; next comes clomiphene plus metformin; after that, injected gonadotropins (), with follicle monitoring. Step three is assisted reproduction: first intrauterine insemination (IUI), then in vitro fertilization (IVF), which has high success rates and suits people with repeated failure of ovulation induction, tubal problems or male-factor infertility.
Once pregnant, a few things need watching. The risk of gestational diabetes (GDM) is clearly higher (a commonly quoted figure is 2–3 times that of other women); the 2023 guideline advises a 75 g when planning pregnancy, or at the first antenatal visit if it was not done, and again at 24–28 weeks. The risks of miscarriage, preterm birth and preeclampsia are also somewhat higher. Metformin: the guideline notes that using it in pregnancy has not been shown to prevent gestational diabetes; in some situations (for example a high risk of preterm birth) it can be considered to reduce preterm delivery and limit excessive weight gain in pregnancy. Evidence on inositol in pregnancy is limited. drugs (semaglutide, liraglutide, tirzepatide) can cause nausea, acid reflux and gallstones, and rarely acute pancreatitis; compared with metformin they produce more weight loss, but cost more, have more side effects and must be stopped before trying to conceive. PCOS means I can't get pregnant is wrong; what is needed is early advice and joint care from endocrinology and obstetrics and gynecology, not despair.
Over the longer term, regular checks matter: once a year, weight, waist, blood pressure, fasting glucose, (HbA1c), blood lipids and your periods; an oral glucose tolerance test every 2–3 years (if HbA1c is still below 5.7%; more often if your risk is high); and stepped-up cardiovascular screening after 40. The lining of the womb (endometrium) is not screened routinely, but it should be checked if periods have been absent for a long time, if there is abnormal bleeding, or if ultrasound shows a lining that stays thick. After menopause, androgen and period problems mostly ease, but insulin resistance and cardiovascular risk remain. One area often overlooked is mental health. PCOS is clearly associated with anxiety, depression and eating disorders (a by Cooney 2017); the 2023 guideline recommends screening all adults with PCOS for depression and anxiety with locally validated questionnaires (such as the PHQ-9 and GAD-7), and the best interval between screenings is not yet known.
Related topics:
endocrine: the hypothalamic-pituitary-gonadal axis, the insulin axis and metabolic syndromecarbs-fiber: glycogen, (the transporter that carries glucose into cells) and insulin signalingfats-omega-3: and as anti-inflammatories; some randomized trials show improvements in some PCOS measuresmagnesium: low magnesium is associated with insulin resistancevitamin-d: the vitamin D receptor, metabolism and conception; most people with PCOS have low vitamin Dvitamin-b12: long-term metformin lowers B12, so it needs monitoringprotein: protein keeps you fuller after meals and supports muscle buildingberberine: acts like metformin, but must not be used when trying to conceive with PCOSnmn-nr: no PCOS-related evidence, not recommendedspirulina: no PCOS-related evidence, plus problems with B12 look-alike compounds and heavy metals
For PCOS, lifestyle change is the foundation the 2023 guideline recommends for every patient (to improve metabolic health, including central fat and blood lipids), with medicines added according to symptoms and goals. It differs from Hashimoto's thyroiditis, where overt hypothyroidism usually means lifelong thyroid hormone replacement. Do not wait for a drug to rescue you, and do not get tied to miracle cure marketing; the most practical levers are the combination of a 5–10% smaller waist, a healthy diet, strength training and sleep.
legro-2014-letrozole-pcos
Chapter 5
Suspect PCOS? What to do first
If you think you might have , the first step is not to pile up supplements or start an extreme diet on your own. It is to see gynecology or endocrinology, where blood tests and ultrasound can tell it apart from several conditions that look similar.
For the first few months after diagnosis, get your waist, eating, strength training and sleep in order, and recheck after three to six months; if that is not enough, adding metformin is the usual next step. If you want to become pregnant, see Trying to conceive, and medicines. PCOS stays with you for a long time; the aim is good long-term control, not a one-time cure.
For the first few months after diagnosis, get your waist, eating, strength training and sleep in order, and recheck after three to six months; if that is not enough, adding metformin is the usual next step. If you want to become pregnant, see Trying to conceive, and medicines. PCOS stays with you for a long time; the aim is good long-term control, not a one-time cure.
Clinical · From diagnosis to long-term follow-up
Why wait for a diagnosis? Because diagnosing means first ruling out several conditions that look very similar, and only blood tests and ultrasound together can tell them apart; heading in the wrong direction costs time. Results take about 2–3 weeks: PCOS is diagnosed when two of the three Rotterdam criteria are met and other causes have been excluded; then the phenotype (A, B, C or D) is identified, and you and your doctor make a plan.Months 1–3, start the lifestyle work: bring your waist down (a 5–10% target if you are overweight); a Mediterranean-style or other healthy diet with enough protein and fiber; strength training 2–3 times a week and 1–2 times a week; 7–9 hours of sleep; stress management; inositol 4 g/day (optional: cheap and low in harm, but with limited evidence for outcomes such as ovulation and weight); vitamin D, folic acid and omega-3. Months 3–6, recheck: have your cycles improved? Is the acne or excess hair better? How have your weight and waist changed? What about mood and sleep? If 6 months of lifestyle change has not done enough, add metformin (under endocrinology guidance). If you want to become pregnant, see Trying to conceive, and medicines.
Red flags (emergency department or urgent medical care): no periods for more than 3 months together with rapidly worsening signs of high androgens and rapid weight change, to rule out Cushing syndrome or a tumor; no periods for more than 3 months together with a thickened womb lining and abnormal bleeding, to rule out endometrial hyperplasia or cancer; a first above 6.5%, to start management of type 2 diabetes; depression or thoughts of self-harm, for immediate psychological or psychiatric care; severe nausea, vomiting and dehydration in pregnancy, which is hyperemesis gravidarum; sudden abdominal pain with bleeding in pregnancy, to rule out ectopic pregnancy or miscarriage.
Long-term monitoring: from 20 to 40, a yearly check of metabolism, a gynecology visit and attention to mental health; over 40, stepped-up cardiovascular screening and attention to ; the lining of the womb is not screened routinely, only checked when periods have been absent for a long time or there is abnormal bleeding. PCOS does not disappear after menopause: the cardiovascular risk and the risk of endometrial cancer are long term, so ongoing gynecology follow-up is needed. The great majority of people can live a full, healthy life with ongoing management. Think of it as a framework for managing a chronic condition: the aim is not a one-time cure but good long-term control, continuous monitoring of risk and a good quality of life. It is the same logic as managing diabetes or high blood pressure.
Tests to have when PCOS is suspected:
See gynecology or endocrinologyBlood tests: total and free testosterone, , and , 17-OHP, prolactin, , AMH, fasting glucose, a 75 g (OGTT), HbA1c, blood lipids, , Pelvic ultrasoundDo not start taking a pile of supplements or an extreme diet on your own
Why so many tests? Because diagnosing PCOS itself means ruling other conditions out: a problem in any one of the androgen, thyroid, prolactin or adrenal axes can produce a picture very like PCOS, and only by looking at the whole set of results together can real PCOS be told apart from these impostors.
References · 3
- Teede, H. J., Tay, C. T., Laven, J. J. E., et al. (2023). Recommendations from the 2023 International Evidence-based Guideline for the Assessment and Management of Polycystic Ovary Syndrome. Fertility and Sterility, 120(4), 767-793. 254 recommendations and practice points. The full text (the simultaneous JCEM publication, PMC10505534) states: PCOS prevalence 10% to 13% (Rotterdam criteria); follicle number per ovary >= 20 in at least 1 ovary is the adult PCOM threshold; AMH may replace ultrasound in adults only; insulin resistance is a pathophysiological factor, but clinically available insulin assays are of limited clinical relevance and should not be used in routine care; inositol could be considered for metabolic measures with limited clinical benefit, metformin should be considered over inositol for hirsutism and central adiposity, and inositol for infertility should be considered experimental (abstract, PMID 37589624; full text, PMC10505534). 10.1016/j.fertnstert.2023.07.025
- Rosenfield, R. L., & Ehrmann, D. A. (2016). The pathogenesis of polycystic ovary syndrome (PCOS): the hypothesis of PCOS as functional ovarian hyperandrogenism revisited. Endocrine Reviews, 37(5), 467-520. 10.1210/er.2015-1104
- Unfer, V., Facchinetti, F., Orrù, B., Giordani, B., & Nestler, J. (2017). Myo-inositol effects in women with PCOS: a meta-analysis of randomized controlled trials. Endocrine Connections, 6(8), 647-658. 9 RCTs, 247 cases and 249 controls, myo-inositol alone or with D-chiro-inositol. Significant: fasting insulin (SMD -1.021) and HOMA index (SMD -0.585). Testosterone showed only a trend (P = 0.099) and androstenedione was unchanged; SHBG rose only in the subgroup of trials giving myo-inositol for at least 24 weeks (abstract, PMID 29042448). 10.1530/EC-17-0243