Polycystic Ovary Syndrome (PCOS) is one of the most common hormonal conditions affecting women and people assigned female at birth — yet it remains one of the most misunderstood. Many people spend years feeling confused, dismissed, or unsure about their symptoms before finally receiving a diagnosis.

Here’s a clear, practical breakdown of what PCOS actually is, why it can be so hard to diagnose, and what the evidence says about managing symptoms, fertility, and long-term health.

Why PCOS Is Difficult to Diagnose

PCOS is diagnosed when someone meets two out of three criteria:

1. Hyperandrogenism
   This means higher-than-usual levels of “male” hormones (androgens), either shown on a blood test or seen clinically through symptoms such as:
• Acne
• Weight gain
• Excess facial or body hair
• Hair thinning or alopecia
2. Irregular or absent ovulation This may look like long cycles, unpredictable periods, or no periods at all.
3. Polycystic ovaries on ultrasound Typically defined as 20+ follicles on one ovary or a “ring of pearls” appearance.

Because people can present with PCOS in very different ways, diagnosis isn’t always straightforward. A common misconception is that PCOS only affects people in larger bodies — but this is simply not true. PCOS can occur in people of all body sizes.

Common Myths and Misconceptions About PCOS

There’s a lot of noise online about PCOS. Here are some of the most common myths your clients may bring to you — and what the evidence actually says.

Certain supplements can cure PCOS.”

No supplement can cure PCOS. Inositol is the most evidence-based option and can support insulin sensitivity and cycle regularity, but it’s not a cure.

“You need to cut carbs or go keto.”

Very low-carb or ketogenic diets are highly restrictive. Some people may see short-term improvements, but these effects rarely last — and many experience rebound eating and weight regain. Sustainable, balanced eating patterns are far more effective long-term.

“Only people in larger bodies get PCOS.”

False. People in smaller bodies can have PCOS and experience the same hormonal, metabolic, and fertility challenges.

“Dairy is inflammatory and should be avoided.”

Dairy is not inflammatory. For some, lactose may trigger IBS-type symptoms — and more than 50% of people with PCOS experience IBS due to hormonal and inflammatory changes. But dairy itself is not harmful and can be part of a balanced diet.

“Gluten causes PCOS symptoms.”

It’s usually not the gluten. For many, it’s the fructans (a type of carbohydrate) in wheat-based foods that cause digestive symptoms.

“Strength training makes PCOS worse.”

Strength training is actually one of the best things you can do. It improves insulin sensitivity, supports glucose regulation, and helps manage metabolic symptoms. A mix of resistance training (higher reps, lower weight) and cardio is ideal.

“You can’t get pregnant naturally with PCOS.”

Not true. People with PCOS often take longer to conceive, but they have similar family sizes to those without PCOS. IVF is not the only option — many conceive naturally or with minimal support.

"PCOS, Fertility, and Reproductive Health"

PCOS develops due to a mix of genetics, environment, and lifestyle factors. Many people have a family history of PCOS that was never formally diagnosed.

Over time, hormonal changes and inflammation can affect:

• How the body stores fat
• How insulin works
• How the liver processes hormones
• Whether ovulation occurs regularly

This is why PCOS can impact fertility, not because pregnancy is impossible, but because ovulation may be less predictable.

Where Dietitians Make a Difference

 

Dietitians play a key role in:

• Improving insulin sensitivity
• Reducing inflammation
• Supporting regular ovulation
• Reducing miscarriage risk
• Improving egg quality
• Supporting healthy implantation

Weight loss is often discussed, but it’s not the only path to improving fertility. Even without weight loss, people can see significant improvements in metabolic markers, cycle regularity, and overall health.

Diet and Lifestyle Strategies That Help PCOS

Research quality varies, but there is strong evidence supporting anti-inflammatory dietary patterns such as:

Mediterranean Diet & DASH Diet

These patterns emphasise:

• Wholegrains
• Fruits and vegetables
• Nuts and seeds
• Beans and legumes
• Moderate fish intake
• Reduced red meat
• Lower sodium intake

These approaches support heart health — important because PCOS increases the risk of high blood pressure and cholesterol changes.

Supplements That May Be Helpful

Some people with PCOS may benefit from targeted supplementation:

• Vitamin D
• Zinc
• Selenium
• Omega-3s (fish or plant-based)
• Vitamin B12 (especially if taking metformin for >6 months)
• Magnesium

Supplement needs vary — individual assessment is essential.

Movement and PCOS

Movement is a powerful tool for managing PCOS symptoms.

• Aim for 150 minutes of moderate or 75 minutes of vigorous activity per week
• Include resistance training 3× per week
• Break up long periods of sitting
• Allow cool-down time to support cortisol regulation

Sleep and Stress Matter Too

PCOS is linked with changes in circadian rhythm, brain fog, fatigue, and disrupted sleep. Poor sleep can increase cravings and affect energy levels.

Stress also plays a role — elevated cortisol, insulin resistance, and high androgens can contribute to low mood, anxiety, and emotional eating.

Supporting sleep hygiene and stress-reduction strategies is an important part of care.

The Importance of Weight-Inclusive Care

Weight-focused approaches can lead to restriction, shame, and unhelpful cycles of dieting. A weight-inclusive approach focuses on:

• Improving clinical markers
• Nourishing the body
• Supporting sustainable habits
• Reducing stigma
• Improving quality of life

Weight changes may occur as a by-product of improved health — but they are not the only measure of success.

Final Thoughts

PCOS is complex, varied, and deeply individual. There is no one “PCOS body type,” no single diet, and no quick fix. But with the right support — including nutrition, movement, sleep, stress management, and compassionate care — people with PCOS can improve symptoms, support fertility, and feel more in control of their health.