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How it is actually diagnosed, why it happens, what treatment does and does not do, and the long-term risks nobody mentions.
Reviewed by Dr. Grishma Ranjangaonkar, MBBS, DGO, ICOG Fellowship in Gynecological Endoscopy · Eva WomanCare Clinic, Vashi
PCOS is the most common hormonal condition in women of reproductive age, and one of the most misexplained. It is not a cyst problem, it is not always a weight problem, and it is not a sentence on your fertility. It is a self-reinforcing loop, and understanding the loop is what makes the treatment make sense.
You will hear both terms in India, often from the same doctor in the same sentence, and the distinction is mostly linguistic rather than medical. PCOD, polycystic ovarian disease, is the older term and tends to be used loosely for ovaries that look polycystic on a scan. PCOS, polycystic ovarian syndrome, is the term used in the medical literature and it means something more specific: a syndrome, meaning a cluster of features that occur together, only one of which is what the ovaries look like.
That difference matters for one practical reason. Plenty of women are told they have PCOD because a scan showed multiple follicles, when their cycles are regular and nothing else fits. Polycystic-looking ovaries are common and on their own are not a diagnosis or a problem. Being labelled with a condition you do not have leads to treatment you do not need.
The definition used almost everywhere is the Rotterdam criteria. You need two of three features, and other conditions that can look similar have to be excluded first.
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PCOS is not one broken thing. It is a self-reinforcing cycle, which is why it is stubborn and why treatment works best when it targets the mechanism rather than only the symptoms.
Two things follow from this. First, South Asian women develop insulin resistance at lower body weights than European populations, which is part of why PCOS is so common here and why the Indian BMI cut-offs are lower. Second, you do not have to be overweight to have PCOS. Lean PCOS is real, insulin resistance can be present at a normal weight, and being told to just lose weight is unhelpful advice when there is no weight to lose.
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This is the part that frightens women most, and the honest answer is more reassuring than the internet suggests. PCOS is one of the more treatable causes of difficulty conceiving. The problem is usually not that the eggs are bad or that the uterus is unwilling. It is that ovulation is unpredictable or absent, so the egg and the sperm are never in the same place at the same time.
There is no cure, and anyone offering one is selling something. What there is, is good control. Treatment is chosen around what you actually want right now, which is why the same woman gets different treatment at different stages of life.
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PCOS is usually presented as a fertility and cosmetic problem. It is also a metabolic one, and the metabolic part outlasts the years when you care about the other two. None of this is inevitable, and all of it is easier to prevent than to treat.
Generic advice to eat well and move more is useless here, because PCOS responds to particular things. What follows is what actually shifts insulin resistance.
Our BMI calculator uses the Indian cut-offs, which classify overweight from 23 rather than 25, and those are the ones that apply to you. The nutrition guide goes further on iron, protein and the practical side of Indian meals.
Myth
“PCOS means you cannot have children”
What is actually true
It means ovulation is unpredictable, not that conception is impossible. Many women with PCOS conceive naturally, and most of the rest do so with straightforward treatment. PCOS is one of the more treatable causes of difficulty conceiving.
Myth
“You have cysts on your ovaries that need removing”
What is actually true
They are not cysts in the sense people mean. They are small immature follicles, each containing an egg that did not develop far enough to be released. There is nothing to remove, and surgery is not a routine treatment.
Myth
“It will go away if you just lose weight”
What is actually true
Weight loss genuinely helps where there is weight to lose, and 5 to 10 per cent can restore ovulation. But lean PCOS exists, insulin resistance occurs at normal weights, and telling a slim woman with PCOS to lose weight is both useless and demoralising.
Myth
“Once your periods are regular on the pill, the PCOS is treated”
What is actually true
Hormonal contraception produces a regular withdrawal bleed and protects the uterine lining, both of which are worth having. It does not address insulin resistance, and the underlying picture is usually unchanged when you stop. That is why the metabolic checks continue regardless.
Diagnosis follows the Rotterdam criteria, the definition in general clinical use. Indian BMI cut-offs are used throughout, because South Asian populations develop insulin resistance at lower body weights. This guide is general information and does not replace advice from your own doctor, who has your history and your results.
Twelve questions on cycles, skin, hair and weight, and where your pattern sits against the diagnostic criteria.
Find the fertile window for your own cycle length. Useful even when cycles are irregular, as a starting point.
Indian and international cut-offs side by side. The Indian ones are what apply to insulin resistance risk.
The practical side of Indian meals, iron and protein, much of which applies to PCOS too.
Most women with PCOS spend years being told it is normal, or being handed the pill without an explanation. A proper assessment takes one visit and a set of bloods, and it changes what you do next, whether or not you are thinking about pregnancy.
