Understanding Polycystic Ovary Syndrome (PCOS): Symptoms, Causes, Diagnosis, Treatment and Long-Term Health

1. What Is Polycystic Ovary Syndrome?

Polycystic Ovary Syndrome is a complex hormonal and metabolic condition that affects how the ovaries function. It is associated with changes in reproductive hormones, irregular or absent ovulation and, in many cases, higher-than-usual levels or effects of androgens.

Androgens are hormones commonly described as male hormones, but they are naturally present in people of all sexes. They have important functions in the body. In people with PCOS, androgen levels or activity may be higher than expected, contributing to symptoms such as acne, unwanted facial or body hair and thinning hair on the scalp.

PCOS may also be associated with insulin resistance, changes in blood glucose regulation and an increased risk of certain metabolic conditions. Its effects are not limited to the reproductive system.

The name can create confusion because not everyone with PCOS has visible ovarian cysts. The condition is not simply a disease in which cysts form on the ovaries. The term often refers to the appearance of numerous small follicles that may be seen during an ultrasound examination.

What are ovarian follicles?

Follicles are small fluid-filled structures inside the ovaries. Each follicle contains an immature egg. During a typical menstrual cycle, several follicles may begin developing, but usually one becomes dominant and releases an egg during ovulation.

In some people with PCOS, the normal process of follicle development and ovulation is disrupted. Many small follicles may remain visible in the ovaries instead of one developing and releasing an egg in the usual way.

2. Understanding the Hormones Involved in PCOS

Hormones are chemical messengers that help coordinate many body functions, including menstruation, ovulation, metabolism, appetite, energy use and reproductive health.

PCOS involves changes in several hormonal systems. The exact pattern differs between individuals, which is one reason the condition can look very different from one person to another.

Androgens

Androgens are produced by the ovaries and adrenal glands. In PCOS, androgen levels or their effects may be increased.

Higher androgen activity may contribute to:

• Increased facial or body hair growth.
• Persistent acne or oily skin.
• Thinning hair on the scalp.
• Disruption of normal follicle development and ovulation.

Insulin

Insulin is a hormone produced by the pancreas. Its main role is to help glucose move from the bloodstream into cells, where it can be used for energy.

Some people with PCOS have insulin resistance. This means that body cells do not respond as effectively to insulin as expected. The pancreas may compensate by producing more insulin.

Higher insulin levels may encourage the ovaries to produce more androgens in some people. This can contribute to hormonal imbalance and interfere with normal ovulation.

Luteinizing hormone and follicle-stimulating hormone

Luteinizing hormone (LH) and follicle-stimulating hormone (FSH) are produced by the pituitary gland and help regulate ovarian function.

These hormones work together to support follicle development and ovulation. In some people with PCOS, their patterns of secretion may be altered. However, an LH-to-FSH ratio is not a reliable standalone test for diagnosing PCOS.

Estrogen and progesterone

Estrogen and progesterone help regulate the menstrual cycle and the lining of the uterus.

When ovulation does not occur regularly, progesterone may not be produced in the usual cyclical pattern. This can lead to prolonged or irregular exposure of the uterine lining to estrogen without the regular balancing effect of progesterone.

Over time, this may increase the risk of excessive thickening of the uterine lining in some people, particularly when menstrual periods are very infrequent.

3. Common Symptoms of PCOS

PCOS does not affect everyone in the same way. Some people experience several symptoms, while others have only a few. Symptoms may also change throughout life.

Irregular menstrual periods

One of the most common features of PCOS is irregular ovulation, which can lead to menstrual cycles that are unusually long, infrequent or absent.

Some people may menstruate only a few times a year, while others have unpredictable bleeding patterns.

Excess facial and body hair

Higher androgen activity can cause increased growth of coarse hair in areas such as the chin, upper lip, chest, lower abdomen and back.

This symptom is known medically as hirsutism. Its severity varies and may cause emotional discomfort or reduced confidence for some people.

Acne and oily skin

Androgens can stimulate oil-producing glands in the skin. This may contribute to persistent acne, particularly around the jawline, chin, chest and back.

Acne associated with PCOS may continue beyond the teenage years and may not respond fully to ordinary skincare products.

Hair thinning on the scalp

Some people experience thinning hair, particularly around the crown or front of the scalp. This can be associated with increased androgen activity.

Weight changes

Some people with PCOS experience weight gain or find weight management difficult. However, PCOS also occurs in people who are not overweight.

Body weight alone cannot confirm or exclude PCOS. The condition is complex, and its metabolic effects differ between individuals.

Darkened areas of skin

Some people develop darker, thicker or velvety patches of skin, often around the neck, armpits or groin. This appearance is known as acanthosis nigricans and can be associated with insulin resistance.

Difficulty becoming pregnant

Irregular or absent ovulation may make it harder to predict fertile days and achieve pregnancy. However, PCOS does not mean that pregnancy is impossible.

Other possible symptoms

Some people with PCOS also report:

• Fatigue or low energy.
• Sleep difficulties.
• Changes in mood.
• Anxiety or depressive symptoms.
• Difficulty with body image or self-confidence.
• Symptoms associated with sleep apnoea in some cases.

These symptoms are not specific to PCOS. A healthcare professional may need to investigate other possible causes.

4. PCOS and Menstrual Irregularities

The menstrual cycle is controlled by a coordinated interaction between the brain, pituitary gland and ovaries. These systems regulate follicle development, ovulation and changes in the uterine lining.

In PCOS, ovulation may happen irregularly or may not happen for extended periods. Without regular ovulation, the usual pattern of hormonal changes during the menstrual cycle may be disrupted.

Why periods become irregular

When a follicle does not mature and release an egg as expected, the body may not produce progesterone in the normal post-ovulation pattern.

This can lead to:

• Long gaps between menstrual periods.
• Unpredictable bleeding.
• Occasionally heavy bleeding after a long period without menstruation.
• Difficulty identifying when ovulation occurs.

Why prolonged gaps between periods matter

When menstrual periods are very infrequent, the uterine lining may remain exposed to estrogen without regular progesterone-related shedding.

Over time, this can increase the risk of endometrial hyperplasia, a condition in which the lining becomes excessively thick. In a small proportion of cases, prolonged untreated endometrial hyperplasia can progress to endometrial cancer.

This does not mean that everyone with PCOS will develop cancer. The risk is influenced by several factors, including the length of time without menstrual periods and other individual health considerations.

5. Possible Causes and Risk Factors

The exact cause of PCOS is not fully understood. Research suggests that genetic, hormonal and metabolic factors all play a role.

Genetic influences

PCOS can occur in families. Someone whose mother, sister or other close relative has PCOS may have a higher likelihood of developing the condition.

Researchers believe several genes may influence susceptibility, but there is no single gene that explains every case.

Insulin resistance

Insulin resistance is common in PCOS, although it is not present in every person with the condition.

When the body needs more insulin to regulate blood glucose, higher insulin levels may contribute to increased androgen production and changes in ovarian function.

Hormonal regulation

Changes in the communication between the brain, pituitary gland and ovaries may contribute to abnormal ovulation and androgen production.

Environmental and developmental influences

Researchers are investigating how early-life development, environmental exposures and other biological factors may influence PCOS. These areas remain under study, and no single environmental explanation has been established.

Is PCOS caused by being overweight?

No. PCOS can occur in people of all body sizes. Higher body weight may worsen certain metabolic features in some individuals, but it is not a requirement for developing the condition.

It is important to avoid blaming individuals for having PCOS or assuming that weight loss alone will resolve every symptom.

6. How Is PCOS Diagnosed?

PCOS is diagnosed through a combination of medical history, examination, blood tests and, when appropriate, ultrasound imaging. There is no single test that can independently confirm every case.

In adults, clinicians commonly use internationally recognized diagnostic criteria. After other possible causes have been excluded, a diagnosis generally requires at least two of the following three features:

1. Irregular or absent ovulation: This may be reflected by irregular menstrual cycles.
2. Clinical or biochemical hyperandrogenism: This means signs of increased androgen activity, such as hirsutism, or elevated androgen levels in blood tests.
3. Polycystic ovarian morphology: A characteristic appearance of the ovaries on ultrasound, or in some adult diagnostic pathways, an appropriately interpreted anti-Müllerian hormone (AMH) result.

Not everyone needs an ultrasound or AMH test. For example, when an adult has both irregular cycles and clear evidence of hyperandrogenism, additional ovarian imaging may not be necessary to establish the diagnosis.

Medical history

A healthcare professional may ask about menstrual patterns, acne, unwanted hair growth, hair loss, weight changes, fertility concerns, medicines and family history.

Physical examination

An examination may assess blood pressure, skin changes, signs of increased androgen activity and other relevant findings. It should be conducted respectfully and with appropriate consent.

Blood tests

Blood tests may be used to measure androgen levels and investigate other possible causes of irregular menstruation or similar symptoms.

Depending on the person's circumstances, a clinician may recommend tests involving:

• Total and free testosterone or related androgen measurements.
• Thyroid function.
• Prolactin.
• Tests to assess blood glucose regulation.
• Lipid profile to assess cholesterol and triglycerides.
• Other hormone tests when clinically appropriate.

Ultrasound examination

Pelvic ultrasound may be used to assess ovarian appearance and investigate other reproductive health conditions.

It is important to remember that ovarian appearance alone does not establish PCOS. Someone can have ovaries with a polycystic appearance without having the full syndrome.

PCOS in teenagers

Diagnosis in adolescents requires particular care because irregular periods and acne can be part of normal puberty.

In adolescents, diagnosis generally requires both persistent menstrual irregularity appropriate to the number of years since menstruation began and evidence of hyperandrogenism, after other causes have been excluded.

Ultrasound and AMH testing are not recommended as diagnostic tests for PCOS in adolescents because normal developmental changes can make interpretation unreliable.

7. PCOS and Fertility

PCOS is an important cause of ovulatory infertility. This means that some people with the condition have difficulty becoming pregnant because their ovaries do not release eggs regularly.

However, PCOS does not mean that pregnancy is impossible. Many people with PCOS become pregnant naturally, while others may benefit from medical assistance.

How PCOS affects ovulation

In a typical menstrual cycle, a follicle develops and releases an egg during ovulation. Hormonal changes then prepare the body for a possible pregnancy.

With PCOS, follicle development may be disrupted. The ovaries may not release an egg regularly, making it more difficult to identify fertile days.

Can someone with PCOS conceive naturally?

Yes. Ovulation may still occur in people with PCOS, even when menstrual periods are irregular. Pregnancy can therefore happen unexpectedly.

People who do not wish to become pregnant should still consider appropriate contraception rather than assuming irregular periods mean pregnancy cannot occur.

Fertility treatment options

When pregnancy is desired and irregular ovulation is the main fertility issue, a clinician may discuss treatments designed to encourage ovulation.

• Letrozole: Often recommended as the first-line medicine for ovulation induction in people with PCOS-related anovulatory infertility when no other major infertility factor is present.
• Clomiphene citrate: Another medicine that may be used to encourage ovulation in selected circumstances.
• Metformin: May be considered in some cases, particularly where metabolic features are present. It can also have a role in fertility treatment for selected patients.
• Gonadotrophins: Injectable hormones may be considered when oral treatments are unsuccessful, with careful monitoring.
• IVF: In vitro fertilisation may be considered when other approaches are unsuccessful or when additional fertility factors are present.

The best treatment depends on age, medical history, ovarian response, other fertility factors and personal preferences.

Pregnancy and PCOS

People with PCOS who become pregnant may have an increased risk of certain pregnancy complications, including gestational diabetes and high blood pressure disorders of pregnancy.

This does not mean these complications will definitely occur. Appropriate antenatal care, screening and monitoring can help identify and manage risks.

8. Treatment and Management Options

PCOS is a long-term condition, and there is currently no single treatment that permanently removes it. Management focuses on the symptoms and health concerns that matter most to each individual.

A treatment plan may change over time. Someone who is not planning pregnancy may have different priorities from someone actively trying to conceive.

Combined hormonal contraceptive pills

Combined oral contraceptives contain estrogen and progestogen. They may be prescribed to help regulate bleeding patterns, reduce androgen-related symptoms and provide contraception.

These medicines may improve acne and reduce unwanted hair growth over time. They can also help protect the uterine lining in people who do not menstruate regularly.

They are not suitable for everyone. Medical history, blood pressure, migraine history, smoking status and other risk factors may influence whether they are appropriate.

Progestogen treatment

Progestogen may be prescribed periodically or through certain contraceptive methods to help protect the uterine lining when menstrual periods are infrequent.

The specific medicine and schedule depend on the individual's health needs and whether contraception is also desired.

Metformin

Metformin is a medicine commonly used to improve blood glucose regulation in people with type 2 diabetes. It may also be used in selected people with PCOS, particularly when metabolic features such as insulin resistance are important concerns.

Metformin may improve some metabolic measurements and can help some people experience more regular menstrual cycles. It is not a universal treatment for every PCOS symptom.

Common side effects include nausea, diarrhoea and abdominal discomfort. A healthcare professional can advise whether it is appropriate and how it should be taken.

Treatment for unwanted hair growth

Unwanted facial and body hair may be managed through several approaches, including:

• Shaving, waxing or threading.
• Laser hair reduction.
• Electrolysis.
• Selected prescription medicines that reduce androgen effects.

Some anti-androgen medicines require reliable contraception because they may harm fetal development if pregnancy occurs. They should only be used under appropriate medical supervision.

Acne treatment

Acne management may involve topical treatments, prescription medicines or hormonal treatment, depending on severity.

A dermatologist may be helpful when acne is persistent, painful or causing scarring.

Fertility treatment

People who wish to become pregnant may benefit from an assessment of ovulation and other fertility factors. Ovulation-inducing medicines may be recommended when appropriate.

Regular follow-up

PCOS management should not focus only on visible symptoms. Regular review may include blood pressure, glucose regulation, cholesterol, menstrual health and emotional wellbeing.

9. Nutrition, Physical Activity and Weight Management

Healthy eating patterns and regular physical activity can support general health in people with PCOS. They may also improve metabolic health and help manage certain symptoms.

However, there is no single PCOS diet that has been proven to work for everyone. Recommendations should be realistic, balanced and adapted to individual needs.

Balanced nutrition

A balanced eating pattern can include:

• Vegetables and fruits.
• Whole grains and other fibre-rich foods.
• Beans, lentils and other sources of plant protein.
• Fish, eggs, poultry and other suitable protein sources.
• Healthy fats from foods such as nuts, seeds and some oils.
• Adequate water throughout the day.

Eating regular, balanced meals may help some people maintain energy levels and support blood glucose regulation.

Understanding carbohydrates

Carbohydrates are an important source of energy. People with PCOS do not necessarily need to eliminate them.

Choosing fibre-rich carbohydrate sources, such as whole grains, beans and vegetables, can be helpful for overall health. The best approach depends on individual nutritional needs and medical circumstances.

Physical activity

Regular movement can improve cardiovascular fitness, support metabolic health and contribute to emotional wellbeing.

Suitable activities may include:

• Walking.
• Cycling.
• Swimming.
• Dancing.
• Strength training.
• Other enjoyable forms of movement.

Consistency is generally more useful than following an extreme exercise programme that is difficult to maintain.

Weight and PCOS

Some people with PCOS may experience improvements in metabolic health and menstrual function after weight changes, particularly when they have excess weight. However, not everyone with PCOS needs to lose weight.

PCOS can occur at any body size, and weight loss is not a guaranteed solution for every symptom. Treatment should not be withheld simply because someone does not lose weight.

A respectful, individualized approach is important. Healthcare professionals should focus on measurable health outcomes rather than making assumptions about someone's health based only on appearance.

10. Mental Health and Emotional Wellbeing

PCOS can affect more than physical health. Unwanted hair growth, acne, hair thinning, changes in body weight, fertility concerns and irregular periods may influence confidence and emotional wellbeing.

Some people with PCOS experience anxiety, depressive symptoms, body image concerns or disordered eating patterns. These difficulties deserve attention alongside the physical symptoms of the condition.

Body image and self-confidence

Visible symptoms such as acne, facial hair and scalp hair thinning can affect how a person feels about their appearance.

It is important to remember that these symptoms are associated with a medical condition. They are not signs of poor hygiene, lack of effort or personal failure.

Fertility-related stress

Difficulty becoming pregnant can be emotionally challenging, especially when someone feels pressure from family, partners or society.

Fertility concerns should be discussed without shame or blame. Medical support and counselling may help individuals and couples understand their options.

When professional support may help

Counselling or mental health care may be useful when someone experiences persistent sadness, anxiety, loss of confidence, distress about body image or difficulty coping with the condition.

Emotional support is not an admission of weakness. It is one part of comprehensive healthcare.

11. Long-Term Health Considerations

PCOS can continue to influence health beyond the reproductive years. Some people have an increased likelihood of developing metabolic and cardiovascular risk factors.

This does not mean that every person with PCOS will develop these conditions. Individual risk depends on many factors, including family history, blood pressure, glucose regulation, cholesterol, lifestyle and age.

Type 2 diabetes

Insulin resistance can increase the likelihood of developing abnormal blood glucose levels and type 2 diabetes.

Appropriate screening helps identify changes early. A healthcare professional may recommend a glucose assessment at diagnosis and repeat testing at intervals based on individual risk.

High blood pressure and cholesterol

Some people with PCOS have higher blood pressure or an unfavorable cholesterol profile. These factors can contribute to cardiovascular risk over time.

Regular monitoring can help identify problems and guide appropriate management.

Endometrial hyperplasia

Prolonged periods without ovulation may lead to insufficient progesterone exposure and continued stimulation of the uterine lining.

This can increase the risk of endometrial hyperplasia. In some cases, it may increase the risk of endometrial cancer.

Maintaining appropriate menstrual or progestogen-related protection is important for people who experience prolonged gaps between periods.

Sleep apnoea

Obstructive sleep apnoea is more common in some people with PCOS, particularly when other risk factors are present.

Symptoms may include loud snoring, interrupted breathing during sleep, morning headaches and excessive daytime sleepiness. These symptoms should be discussed with a healthcare professional.

Ongoing health checks

Depending on individual circumstances, routine follow-up may include:

• Blood pressure checks.
• Blood glucose testing.
• Cholesterol and triglyceride assessment.
• Review of menstrual patterns.
• Assessment of sleep and mental health.
• Review of fertility goals and treatment needs.

12. Common Myths About PCOS

Myth 1: PCOS only affects people who are overweight.

PCOS can affect people of all body sizes. Weight is not a diagnostic requirement.

Myth 2: Everyone with PCOS has ovarian cysts.

Not everyone with PCOS has polycystic ovarian morphology on ultrasound. The diagnosis is based on a combination of clinical features and appropriate investigations.

Myth 3: PCOS means someone cannot become pregnant.

Many people with PCOS conceive naturally. Others may need help with ovulation or fertility treatment.

Myth 4: PCOS is caused by eating too much sugar.

Diet alone does not explain PCOS. It is a complex condition involving genetic, hormonal and metabolic factors.

Myth 5: Every person with PCOS needs metformin.

Metformin may be useful in selected cases, but it is not necessary or appropriate for everyone. Treatment depends on individual symptoms and health goals.

Myth 6: PCOS always disappears after pregnancy.

Pregnancy does not cure PCOS. Symptoms and hormonal patterns may change over time, but the underlying condition can remain.

Myth 7: PCOS is only a fertility problem.

PCOS can affect reproductive, metabolic, skin and emotional health. Its management should consider the whole person.

Myth 8: Losing weight will cure PCOS.

Weight management may improve some health markers in certain people, but PCOS can occur at any weight and does not have a guaranteed permanent cure.

13. When to Seek Medical Advice

Anyone experiencing persistent irregular periods, excessive facial or body hair growth, unexplained scalp hair thinning, severe acne or difficulty becoming pregnant may benefit from medical assessment.

Early assessment can help identify PCOS and distinguish it from other conditions that may cause similar symptoms.

Seek an assessment if:

• You regularly go several months without a menstrual period.
• Your menstrual cycle becomes persistently irregular.
• You develop new or worsening facial or body hair growth.
• You experience persistent acne or unusual hair thinning.
• You have concerns about blood glucose or other metabolic symptoms.
• You have been trying to become pregnant without success.
• You have significant emotional distress related to symptoms.

Preparing for a medical appointment

Before an appointment, it may help to record:

• Dates of recent menstrual periods.
• How frequently periods occur.
• Changes in acne, hair growth or scalp hair.
• Any major weight or energy changes.
• Medicines and supplements currently being used.
• Pregnancy plans or fertility concerns.
• Family history of diabetes or hormonal conditions.

Useful questions to ask include:

• Do my symptoms suggest PCOS?
• What other conditions should be ruled out?
• Which blood tests or examinations are appropriate?
• Do I need treatment to protect my uterine lining?
• Should my blood glucose and cholesterol be checked?
• What treatment options match my current health goals?
• How might PCOS affect my future fertility?

14. Frequently Asked Questions About PCOS

15. Taking Control of Your Health With PCOS

Understanding PCOS is an important part of managing its effects. Although the condition can create challenges involving menstrual health, skin, hair growth, metabolism, fertility and emotional wellbeing, it is possible to build a treatment plan that addresses individual needs.

The first step is recognizing that PCOS is not simply a problem involving ovarian cysts or body weight. It is a complex hormonal condition that can affect different systems throughout the body.

Medical assessment helps establish whether symptoms are related to PCOS or another condition. Once a diagnosis is made, treatment can be selected according to the person's priorities, whether those involve regulating periods, improving acne, managing unwanted hair growth, protecting long-term health or becoming pregnant.

Lifestyle habits can support overall wellbeing, but individuals should not feel pressured to follow extreme diets, use unproven supplements or blame themselves for having the condition.

PCOS management is not about achieving one particular body shape or meeting someone else's expectations. It is about understanding the condition, reducing health risks and making informed decisions with appropriate professional support.

With accurate information, individualized care and regular health monitoring, many people with PCOS can manage their symptoms and maintain a good quality of life.

Medical References and Further Reading

The following established medical organizations provide additional information about PCOS, reproductive health, diagnosis and treatment:

• World Health Organization (WHO) – Polycystic Ovary Syndrome
• NHS – Polycystic Ovary Syndrome
• Monash University – International Evidence-Based PCOS Guideline
• American College of Obstetricians and Gynecologists – PCOS
• Centers for Disease Control and Prevention – Diabetes Information

Continue Exploring the PORNVIEW Wellness Center

Reproductive health involves many connected systems. Explore these related educational guides to learn more about menstrual health, fertility, hormonal changes and sexual wellbeing.

• Understanding Endometriosis
• Menstrual Health and the Menstrual Cycle
• Understanding Fertility and Ovulation
• Understanding Menopause and Perimenopause
• Understanding Sexual Health
• Sexual Health Checkups: What to Expect
• Building Healthy Relationships