Educational draft · awaiting clinical reviewThe full textbook explains uncertainty but does not replace live national or local guidance, specialist advice, or current prescribing information.
Identify cardiometabolic, endometrial, sleep and psychological risks in PCOS, use proportionate surveillance, and prevent harm without indiscriminate screening or weight stigma.
PCOS affects more than cycles and hair growth. Insulin resistance, dysglycaemia, adverse lipid patterns, hypertension, sleep-disordered breathing and psychological morbidity occur more often than in peers, although individual risk varies widely. Assess the person rather than using BMI as a proxy. Ask about family history, previous gestational diabetes, smoking, medicines, ethnicity, sleep, mental health, food access and reproductive plans, then agree which results will change care.
The 2023 international guideline identifies the oral glucose tolerance test as the most accurate glycaemic test in PCOS regardless of BMI. Assess glycaemia when PCOS is diagnosed and repeat every one to three years according to age, baseline result, family history and other diabetes risks. If an OGTT cannot be completed, fasting plasma glucose or HbA1c can be used with an explanation that accuracy is reduced. An OGTT is particularly important when pregnancy is planned or fertility treatment is sought because pre-existing dysglycaemia changes pregnancy care.
Obtain a lipid profile at diagnosis in all adults, then set the repeat interval from the result and overall cardiovascular risk. Measure blood pressure annually and during preconception or fertility planning. Counsel about cardiovascular health without claiming that every young person with PCOS will have a cardiovascular event. Follow national disease-specific guidance when hypertension, diabetes or dyslipidaemia is found; the PCOS diagnosis does not create a separate treatment target.
Family history, previous gestational diabetes, increasing age, higher adiposity or a prior abnormal result raises risk, but normal BMI does not remove the need for baseline assessment.
Very infrequent bleeding, prolonged amenorrhoea and irregular heavy shedding suggest extended intervals without luteal progesterone and prompt a protection review.
Snoring with waking unrefreshed, daytime sleepiness, nocturnal choking or witnessed apnoea supports formal sleep evaluation rather than fatigue attribution to PCOS.
Low mood, anxiety, distress about hair or fertility, restrictive eating and weight stigma can materially affect adherence, relationships and quality of life.
Pre-existing dysglycaemia, hypertension, sleep apnoea and higher weight modify obstetric risk and are most usefully addressed before conception.
Exclude pregnancy and investigate concerning bleeding first; the SmPC contraindicates known, past or suspected breast cancer, previous idiopathic or current venous thromboembolism, active or recent arterial thromboembolic disease, unresolved liver disease and porphyria. Do not mistake withdrawal bleeding for restored ovulation.
Post-load dysglycaemia may be present despite reassuring fasting glucose or HbA1c, which is why OGTT is the more accurate PCOS test.
Higher relative endometrial-cancer risk coexists with low absolute risk in young people, so symptom-led assessment and prevention outperform routine biopsy.
Activity, sleep and sustainable nutrition can improve metabolic measures and wellbeing even when body weight remains stable.
Cyclic progestogen can protect the endometrium but does not diagnose the cause of anovulation, provide contraception or restore fertility.
Sleep apnoea, depression, iron deficiency, thyroid disease, medication effects and inadequate sleep should be considered before fatigue is assigned to PCOS.
Using a normal BMI or normal HbA1c to decide that glycaemic assessment is unnecessary.
Ordering routine serial pelvic ultrasound or endometrial biopsy in an asymptomatic person solely because PCOS is present.
Allowing repeated long amenorrhoeic intervals without discussing contraception and endometrial protection.
Attributing all abnormal bleeding to anovulation and missing pregnancy, cervical disease, fibroids, hyperplasia or cancer.
Delivering restrictive weight advice without screening for eating disorders, food access, mental health and previous stigma.
Identifying probable sleep apnoea or depression on a questionnaire without arranging diagnostic assessment and follow-through.
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A 29-year-old with newly diagnosed PCOS has a BMI of 23 kg/m² and no symptoms of hyperglycaemia. Which test most accurately assesses glycaemic status in current PCOS guidance?
National guidance is shown before implementation-dependent detail. Typical adult dose examples remain subject to patient factors, contraindications and the live BNF or specialist protocol. Source check completed 27 Aug 2026; clinical approval remains outstanding.
Editorial contact: Doctor’s Passport editorial team. Source-check date is separate from clinical approval. Report a content problem · Content changes
Chronic anovulation can expose the endometrium to prolonged oestrogen without organised luteal progesterone. PCOS is associated with increased endometrial hyperplasia and cancer risk, but the absolute likelihood in a young asymptomatic population remains low. Routine screening with ultrasound or biopsy is therefore not recommended. Prevention instead focuses on avoiding very long untreated gaps, providing cycle regulation or regular progestogen exposure, and modifying additional risks where possible. A persistently thick endometrium or abnormal bleeding is an indication for assessment, not screening.
The choice of endometrial protection depends on pregnancy intention and contraceptive eligibility. Options include combined hormonal contraception, a levonorgestrel intrauterine system or intermittent oral progestogen. A withdrawal bleed is expected after a cyclic course, but its absence may reflect a thin hypo-oestrogenic endometrium, pregnancy or outflow disease and should be interpreted clinically. Do not keep issuing courses while ignoring new heavy, prolonged or intermenstrual bleeding.
Psychological and sleep risks need active questions. Depression and anxiety should be screened with locally validated tools and followed by assessment, not treated as inevitable consequences of appearance or weight. Eating disorders and disordered eating can occur at any size and may be worsened by restrictive advice. Ask about snoring, non-restorative sleep, waking unrefreshed and daytime sleepiness; a validated obstructive-sleep-apnoea screen helps decide referral, but diagnosis requires a sleep study.
Lifestyle support should be collaborative, culturally workable and weight inclusive. Regular physical activity, reduced sedentary time, adequate sleep and sustainable food patterns have benefits even when weight does not change. If a person wants weight management, agree realistic goals and avoid repeated blame. Anti-obesity medicines or bariatric surgery follow general population indications and reproductive safety rules; they are not automatic PCOS treatments and require a contraception and pregnancy plan.