PCOS is one of the most common hormonal conditions in women — yet many go undiagnosed for years. Here's what to look for.
Polycystic ovary syndrome (PCOS) affects approximately 1 in 10 women of reproductive age, making it one of the most prevalent hormonal disorders worldwide. It is a condition in which the ovaries produce an excess of androgens — hormones typically considered "male" — which disrupts the normal hormonal balance and interferes with ovulation. Despite how common it is, many women live with PCOS for years without a diagnosis, partly because symptoms vary so widely from person to person.
Understanding the signs of PCOS is the first step toward getting answers, managing your health, and improving your quality of life. This guide covers the 10 most recognised symptoms, how PCOS is diagnosed, what drives the condition, and the most evidence-based approaches to managing it.
One of the most hallmark signs of PCOS is menstrual irregularity. This includes cycles that are longer than 35 days, fewer than 8 periods per year, or no periods at all (amenorrhea). Irregular ovulation — or a lack of ovulation entirely — is what drives this pattern. If you notice your cycle is consistently unpredictable, this is worth raising with your doctor.
Elevated androgen levels in PCOS can stimulate hair follicles in areas where women don't typically have coarse hair. Hirsutism — unwanted, male-pattern hair growth — commonly affects the chin, upper lip, chest, stomach, and upper back. It affects up to 70% of women with PCOS and is one of the most distressing symptoms for many. Laser hair removal, medications like spironolactone, and hormonal contraceptives can all help.
Androgens stimulate the sebaceous (oil) glands in the skin, and higher androgen levels in PCOS can result in persistent adult acne — particularly along the lower face, jawline, and chin. Unlike teenage acne, PCOS-related acne tends to be deeper, more cystic, and more resistant to standard topical treatments. It often flares with the menstrual cycle (or lack of one).
Paradoxically, while PCOS can cause excess hair growth on the body, it can also cause thinning of the hair on the scalp — a condition known as androgenic alopecia or female pattern hair loss. This typically presents as a widening part or overall reduced volume rather than a receding hairline. It is caused by the same androgen excess that drives hirsutism.
Many women with PCOS find it significantly harder to manage their weight, particularly around the abdomen. This is closely linked to insulin resistance (see below), which affects how the body stores and uses energy. Central weight gain can itself worsen insulin resistance and androgen levels, creating a cycle that makes metabolic management particularly challenging without the right approach.
Dark, velvety patches of skin — typically appearing on the neck, armpits, groin, or under the breasts — are called acanthosis nigricans and are a visible sign of insulin resistance. Small skin tags in these same areas are also associated with insulin resistance. Both are more common in women with PCOS and can serve as a useful clinical clue for your doctor.
Despite the name, "polycystic" ovaries don't contain true cysts. What shows up on ultrasound are multiple small, immature follicles — each one a potential egg that didn't fully develop or release. The current threshold for a "polycystic" ovary is 20 or more follicles per ovary, or an ovarian volume greater than 10 mL. Importantly, many women with PCOS have ovaries that look completely normal on ultrasound.
PCOS is the most common cause of anovulatory infertility — difficulty conceiving due to irregular or absent ovulation. When ovulation doesn't happen on a predictable schedule, or doesn't happen at all, it becomes much harder to time conception. However, it's important to know that PCOS does not mean infertility. Many women with PCOS conceive naturally or with relatively minimal intervention such as ovulation induction.
Women with PCOS have a significantly higher prevalence of anxiety and depression compared to the general population. This appears to be driven by a combination of factors: hormonal fluctuations, the psychological burden of managing a chronic condition, sleep disruption, and potentially direct effects of androgen excess on mood regulation. If you're experiencing persistent low mood or anxiety alongside other PCOS symptoms, this connection is worth discussing with your healthcare provider.
Persistent, unexplained fatigue is a frequently reported but underappreciated symptom of PCOS. It is often linked to insulin resistance — when cells don't respond efficiently to insulin, energy regulation becomes impaired. Sleep disturbances (PCOS is associated with a higher risk of sleep apnoea), inflammation, and mood disorders can all compound the fatigue experienced by women with PCOS.
Up to 70% of women with PCOS have some degree of insulin resistance — a condition in which the body's cells don't respond properly to insulin, causing the pancreas to produce more of it. This elevated insulin doesn't just affect blood sugar; high insulin levels directly stimulate the ovaries to produce more androgens (testosterone), which worsens many of the symptoms described above.
Insulin resistance in PCOS creates a reinforcing cycle: high insulin raises androgens, which disrupts ovulation, which affects the hormonal environment, which can worsen weight gain, which worsens insulin resistance further. Breaking this cycle — primarily through lifestyle changes — is central to PCOS management.
Women with PCOS and insulin resistance are at increased long-term risk of developing type 2 diabetes and cardiovascular disease, which is why early identification and management matters beyond just managing symptoms.
If you recognise several of these symptoms in yourself, the next step is to see your GP or a gynaecologist. Getting a PCOS diagnosis typically involves a combination of:
It's worth noting that PCOS is a diagnosis of exclusion — your doctor will want to rule out other conditions (such as hypothyroidism, hyperprolactinaemia, or congenital adrenal hyperplasia) that can produce similar symptoms before confirming a PCOS diagnosis.
PCOS has no single cure, but it is very manageable. The right approach depends on your specific symptoms, whether you're trying to conceive, and whether insulin resistance is a prominent feature.
Lifestyle modification is the most evidence-based first-line treatment for PCOS, particularly for women with insulin resistance or overweight. A low-glycaemic, anti-inflammatory diet combined with regular exercise — particularly strength training and aerobic exercise — has been shown to reduce androgens, restore menstrual regularity, and improve insulin sensitivity. Even a 5–10% reduction in body weight (where relevant) can produce significant hormonal improvements.
Depending on your primary concerns, your doctor may recommend: metformin (an insulin-sensitising medication that also helps regulate cycles), the combined oral contraceptive pill (to regulate periods, reduce androgen effects, and manage acne and hirsutism), or spironolactone (an androgen blocker particularly helpful for hirsutism and acne). For women trying to conceive, ovulation induction medications such as letrozole or clomiphene may be used.
Inositol — particularly the combination of myo-inositol and D-chiro-inositol — is one of the most studied supplements for PCOS and has shown meaningful effects on insulin sensitivity, androgen levels, and ovulatory function in clinical trials. Other supplements with some supporting evidence include vitamin D (deficiency is common in PCOS), magnesium, and omega-3 fatty acids. Always discuss supplements with your doctor before starting them, especially if you're taking medications.
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Start tracking free →Yes. Despite the name, ovarian cysts are not required for a PCOS diagnosis. Under the Rotterdam criteria, you only need 2 of 3 features: irregular periods, androgen excess, and polycystic ovaries on ultrasound. Many women are diagnosed with PCOS based on irregular periods and elevated androgens alone, with normal-appearing ovaries.
PCOS cannot be cured, but it can be effectively managed. Many women find that lifestyle changes significantly reduce their symptoms to the point where they have minimal impact on daily life. Some women also find that their PCOS symptoms naturally improve after menopause, as the hormonal landscape shifts. The focus is on long-term management rather than a cure.
No. While PCOS is associated with weight gain in many women — particularly due to insulin resistance — not all women with PCOS are overweight. "Lean PCOS" affects women of a healthy body weight and is just as valid. The condition is driven by hormonal imbalance, not body size. However, managing weight through lifestyle changes remains beneficial for symptom management regardless of starting weight.
Yes — most women with PCOS can and do get pregnant. PCOS is the most common cause of anovulatory infertility, but this doesn't mean permanent infertility. Many women conceive naturally, particularly after lifestyle modifications. For those who need support, ovulation induction medications (like letrozole) are highly effective. IVF is also an option if other interventions don't succeed.
The picture is mixed. Some symptoms — particularly menstrual irregularity — can actually improve with age as natural hormonal changes occur approaching perimenopause. However, the metabolic aspects of PCOS (insulin resistance, risk of type 2 diabetes) can worsen if not actively managed. The long-term health risks of PCOS make ongoing management important regardless of how symptoms feel in the short term.