Maybe you've heard of PCOS. But what does it actually mean?
Maybe your periods have never been particularly predictable.
Perhaps you have struggled with acne long after your teenage years. Maybe you have noticed more facial hair, thinning scalp hair or changes in your weight. Or perhaps you are trying to become pregnant and someone has mentioned PCOS.
Then come the questions:
Do I really have cysts? Will I be able to have children? Is this because I gained weight? Will I get diabetes?
Let's slow this down.
PCOS — now also called polyendocrine metabolic ovarian syndrome (PMOS) in international terminology — is a complex hormonal and metabolic condition. It can affect periods, ovulation, skin, hair, metabolism, fertility and emotional wellbeing. [1] [7]
Having PCOS does not mean your body is broken, that you are infertile or that you have done something wrong.
Why PCOS is now called PMOS
For decades, the condition has been known as polycystic ovary syndrome, or PCOS.
In 2026, an international consensus process renamed it polyendocrine metabolic ovarian syndrome, or PMOS, to reflect that the condition involves much more than the ovaries. [7] If you already have a PCOS diagnosis, nothing about that diagnosis, your prescription or your treatment plan changes — only the name does. PCOS will continue to appear in medical literature, clinics and lab reports during the transition, so this article uses it throughout.
Think of it as several connected systems:
Hormones ↔ ovaries ↔ ovulation ↔ metabolism ↔ skin and hair ↔ fertility ↔ long-term health
That is why calling it simply an "ovarian problem" does not tell the whole story.
What does PCOS look like in India?
Indian research is useful because prevalence estimates can look very different depending on how PCOS is defined and which population is studied.
A large nationwide Indian study published in JAMA Network Open in 2024 included 9,824 women aged 18–40 from five regions of India. Depending on the diagnostic criteria used, estimated prevalence ranged from 7.2% using NIH criteria to 19.6% using Rotterdam criteria. [3]
So which number should you remember?
Not one particular number. Remember that PCOS is common in India, but prevalence estimates depend partly on how the condition is defined and measured. [3]
That is also why an online symptom checklist cannot diagnose you.
So what actually happens in PCOS?
Think of your menstrual cycle as a conversation.
- Your brain sends hormonal signals.
- Your ovaries respond.
- An egg develops.
- Ovulation occurs.
- Hormones change.
- Your uterine lining responds.
In PCOS, this communication can become less predictable. [1]
Higher androgen activity can contribute to acne, increased facial or body hair and scalp hair thinning. Irregular ovulation can lead to irregular or absent periods. Metabolic changes, including insulin resistance, can also occur. [1]
But PCOS is not simply an insulin problem. Genetic, hormonal and metabolic factors interact. [1]
What are the symptoms?
There is no single symptom that gives you the answer. You may experience any of the following.
Irregular periods
You may have long gaps between periods, fewer periods, or periods stopping for months. [1]
Acne and oily skin
Higher androgen activity can increase oil production and contribute to acne. But acne alone does not diagnose PCOS. [1]
Increased facial or body hair
New or progressively coarse hair, particularly around the upper lip, chin, chest or abdomen, may indicate increased androgen activity. This is called hirsutism.
And please remember: facial hair is a biological symptom — not a failure of personal grooming.
Hair thinning
Some women experience thinning around the crown or central parting.
Changes in weight or metabolism
Some women with PCOS experience weight gain or metabolic abnormalities. Others don't.
You can have PCOS at any body size. A woman who is lean can still have PCOS, insulin resistance or metabolic risk, while having obesity does not automatically mean you have PCOS. [1]
PCOS is not a weight problem
Let's address something many Indian women hear:
"Just lose weight and your PCOS will go away."
It isn't that simple. PCOS can occur across the weight spectrum.
Weight can be relevant to metabolic health, and for some women, weight management may improve health outcomes. But healthy lifestyle behaviours can improve health even without weight loss. [1]
Perhaps the goal should not be make your body smaller. It should be make your health stronger.
How is PCOS diagnosed?
There is no single "PCOS blood test."
In adults, diagnosis considers three broad features: [1] [2]
- Ovulatory dysfunction — usually reflected by irregular or infrequent menstrual cycles.
- Hyperandrogenism — this may be clinical, such as hirsutism, or biochemical, shown through appropriate blood testing.
- Polycystic ovarian morphology — an ultrasound may show a particular ovarian follicle pattern. In adults, appropriately interpreted AMH may also be used as an alternative to ultrasound within the diagnostic pathway.
Generally, two of these three features may support a diagnosis after other causes have been excluded. [1]
And here is an important myth: you do not need ovarian "cysts" to have PCOS.
The follicles seen on ultrasound are not necessarily the ovarian cysts people imagine when they hear the word cyst. Seeing multiple follicles does not automatically mean you have PCOS. [1]
What about teenagers?
This needs extra care because puberty can resemble PCOS. Periods may naturally be irregular during the early years after menarche.
Certain patterns become more concerning, such as: [6]
- Between one and less than three years after menarche: cycles longer than 45 days
- More than three years after menarche: cycles shorter than 21 days or longer than 35 days
- More than 90 days without a period, at any point after the first year
- No period by age 15, or more than three years after breast development began
Adolescent PCOS diagnosis requires both ovulatory dysfunction and hyperandrogenism. Ultrasound and AMH are not recommended for diagnosis within eight years of the first period, because of limited specificity at this stage. [6]
So if your 14-year-old daughter's periods are irregular, do not immediately assume she has PCOS. Sometimes monitoring and reassessment is the right approach, and a girl who has some features but does not meet full criteria can be followed up rather than labelled. [6]
Why does PCOS happen?
The honest answer is that there is no single cause.
Genetic factors appear to contribute, and PCOS can run in families. Hormonal and metabolic factors interact with genetic susceptibility. [1]
But one food, one habit or one lifestyle choice does not cause PCOS.
So please do not blame yourself. And parents, please do not blame your daughter.
The metabolic side of PCOS
This is easy to miss when conversations focus only on periods and fertility.
PCOS is associated with a higher risk of: [1] [4]
- Insulin resistance
- Impaired glucose regulation
- Type 2 diabetes
- Abnormal cholesterol
- High blood pressure
- Cardiometabolic disease
- Sleep apnoea in some women
The international guideline recommends assessing glucose status at diagnosis and monitoring metabolic risk, including lipids and blood pressure. The 75-g oral glucose tolerance test is identified as the most accurate glucose assessment in PCOS, regardless of BMI. [5]
This does not mean that if you have PCOS you will get diabetes. It means knowing your risk gives you an opportunity to act early.
Indian research also highlights why metabolic health matters. In the large Indian study mentioned earlier, women with PCOS had substantial rates of dyslipidaemia, obesity, fatty liver disease and metabolic syndrome. These figures describe that study population — not every woman with PCOS. [3]
What can you do?
You do not need to redesign your life tomorrow morning.
There is no single "PCOS diet" or universally superior exercise programme. [1] Instead, build sustainable habits around the food and lifestyle you already have. Think adequate nutrition, protein, fibre and overall balance rather than a magical PCOS food.
Movement counts too. Choose something you can actually live with.
You do not need to punish your body to care for it.
What about treatment?
Treatment depends on what you need help with. Someone trying to regulate periods may need a different approach from someone trying to conceive. Acne, excess hair and metabolic risk may require different strategies. [1] [5]
Depending on the individual situation, treatment may include: [1]
- Combined oral contraceptive pills for appropriate women, which can help with irregular cycles and androgen-related symptoms such as acne or hirsutism
- Metformin, particularly when metabolic outcomes are a concern
- Other symptom-specific approaches
Regulating cycles is not only about convenience. Very long gaps between periods mean the uterine lining is not shed regularly, and over time this can increase the risk of endometrial hyperplasia and endometrial cancer — one reason a doctor may suggest treatment even when pregnancy is not the goal. [1] [2]
All of these are prescription medicines. They need assessment before starting and monitoring afterwards, and the right choice depends on your symptoms, your medical history and your goals. Please do not start or stop any of them on your own.
Metformin is not a universal PCOS medicine that every woman needs.
Inositol is widely discussed online, but current evidence does not support confidently recommending one specific type, dose or combination for everyone. [1]
So when someone says take this exact supplement and your hormones will be fixed — pause. Popular is not the same as proven.
What if you want to have a baby?
This is often the biggest fear: will I be able to get pregnant?
For many women, yes. PCOS can make conception more difficult because ovulation may not happen regularly. But PCOS does not equal infertility. [4]
When infertility is caused by anovulation related to PCOS and there are no other infertility factors, letrozole is recommended as first-line pharmacological treatment for ovulation induction. [1] [5] Other fertility treatments, including assisted reproductive technologies, may be considered when appropriate.
If you are planning pregnancy, metabolic health matters too, because PCOS is associated with increased risks such as gestational diabetes and hypertensive disorders during pregnancy. [1]
What PCOS is not
Let's clear up the big ones. Each of these is a myth.
- Myth: PCOS means you have ovarian cysts.
- Myth: PCOS means you cannot have children.
- Myth: PCOS only happens with obesity.
- Myth: You caused PCOS by eating "bad" food.
- Myth: You need a restrictive PCOS diet.
- Myth: PCOS means you will definitely develop diabetes.
PCOS is a complex, long-term condition that can look different at different body sizes and life stages. [1]
When should you see a doctor?
Consider an evaluation if you have: [1]
- Persistently irregular or absent periods
- New or significant facial or body hair growth
- Persistent acne alongside menstrual or androgen-related symptoms
- Unexplained scalp hair thinning
- Difficulty conceiving
- Significant metabolic risk factors or symptoms suggesting diabetes
- Persistent snoring or unrefreshing sleep
- Anxiety, depression or significant body-image distress
You do not need every symptom. And you do not need to diagnose yourself before asking for help. The purpose of an evaluation is to understand what is happening, not to put a frightening label on you.
From the doctor's desk
"PCOS is not simply a problem of the ovaries, and it certainly isn't a measure of a woman's health, appearance or worth.
Good PCOS care looks at the whole woman — her menstrual health, metabolic health, emotional wellbeing, fertility goals and long-term health."
— Dr. Sowmya Sampurna M, Consultant Obstetrics & Gynaecology
Key takeaways
- PCOS, now also called PMOS, is a complex hormonal and metabolic condition affecting more than the ovaries.
- Irregular periods or acne alone do not diagnose PCOS.
- You do not need ovarian cysts to have PCOS.
- PCOS can occur at any body size.
- Teenagers require special consideration because normal puberty can resemble PCOS.
- Metabolic health deserves attention even when weight is not a concern.
- There is no single "PCOS diet."
- Treatment depends on symptoms, risks and goals, and the medicines used are prescription-only.
- PCOS can make conception more difficult, but it does not mean infertility.
- PCOS is a health condition, not a verdict on your body or your future.
References
[1] Teede HJ, Tay CT, Laven JJE, et al. Recommendations from the 2023 International Evidence-based Guideline for the Assessment and Management of Polycystic Ovary Syndrome. Human Reproduction. 2023;38(9):1655–1679. doi:10.1093/humrep/dead156
[2] International PCOS Network. International Evidence-based Guideline for the Assessment and Management of Polycystic Ovary Syndrome 2023. Monash University; 2023.
[3] Ganie MA, Chowdhury S, Malhotra N, et al. Prevalence, Phenotypes, and Comorbidities of Polycystic Ovary Syndrome Among Indian Women. JAMA Network Open. 2024;7(10):e2440583. doi:10.1001/jamanetworkopen.2024.40583
[4] World Health Organization. Polycystic ovary syndrome. Accessed August 2026.
[5] Teede HJ, Tay CT, Laven JJE, et al. 2023 International Evidence-based Guideline — diagnostic criteria, metabolic risk, lifestyle, psychological wellbeing and fertility management. Monash Centre for Health Research and Implementation.
[6] International PCOS Guideline — adolescent recommendations. 2023 International Evidence-based Guideline for the Assessment and Management of PCOS: adolescent diagnostic criteria, including menstrual irregularity and hyperandrogenism, and the avoidance of ultrasound and AMH for diagnosis in adolescents.
[7] Teede HJ, Bahri Khomami M, Morman R, et al. Polyendocrine metabolic ovarian syndrome, the new name for polycystic ovary syndrome: a multistep global consensus process. Lancet. Published online May 12, 2026. doi:10.1016/S0140-6736(26)00717-8