The Trouble Diagnosing PCOS: What You Need to Know

For many people, finally getting a diagnosis of Polycystic Ovary Syndrome (PCOS) can take years—years filled with confusion, frustration, and feeling unheard. Many share stories of being told their symptoms were “all in their head,” only to learn later that while their blood work might look “normal,” there was a deeper hormonal story that standard tests missed.

This blog aims to shed light on why PCOS diagnosis can be tricky and what important factors to understand while navigating this journey.

What Exactly Is PCOS?

In theory, diagnosing PCOS seems straightforward. It traditionally requires two of the following three features:

Elevated testosterone (either through blood test or clinical features like acne or excessive hair growth)
Polycystic ovarian appearance on ultrasound
Irregular or absent menstrual periods (oligo- or anovulation)

If you have two or three of these, your healthcare provider can diagnose PCOS—assuming these tests were done and interpreted correctly. Unfortunately, testing is often incomplete or results are misread, leaving many to suffer without answers for years.

Why Testing Testosterone Alone Isn’t Enough

Testosterone tests measure your total hormone level but don’t reveal how much is active—that is, how much testosterone is free to affect your body. This is where Sex Hormone-Binding Globulin (SHBG) enters the picture. Think of SHBG as a protective hug that binds testosterone, limiting its activity.

The Free Androgen Index (FAI)—the ratio of testosterone to SHBG—gives a better picture of hormonal imbalance. You can have “normal” testosterone but still experience symptoms like acne, excessive hair growth, or irregular cycles if SHBG is low, leaving more active free testosterone.

That’s why the diagnostic criterion has recently been updated to include not just high testosterone levels on blood testing, but also clinical features.

Cysts or Not: What the Name Really Means

You might be surprised to learn that you don’t need to have cysts on your ovaries to have PCOS. What ultrasound picks up as “cysts” are actually immature follicles waiting to mature. Many people with PCOS have ovaries that look typical on scans, while some without PCOS have polycystic appearances.

Other Tests That Matter

Diagnosis shouldn’t rely solely on these three signs. To better understand your unique hormone and metabolic profile, other tests are essential:

Thyroid Function Testing: Hypothyroidism is common in PCOS, and low thyroid hormone can mimic or worsen some PCOS symptoms by disrupting follicle development.
LH:FSH Ratio: While levels fluctuate, an elevated luteinising hormone (LH) relative to follicle-stimulating hormone (FSH) (often around 2:1 or 3:1 instead of 1:1) supports a PCOS diagnosis. Learn more at PCOS and Normal Hormones? Discover What’s Really Going On.
Insulin Levels and Resistance Testing: Many individuals with PCOS have insulin resistance, regardless of their weight. Measuring insulin—especially via a glucose tolerance test with insulin levels—is crucial because blood sugar alone doesn’t reveal insulin dysfunction.

Recognising the Tell-Tale Signs That Often Point to PCOS

Sometimes, the signs of PCOS are so clear that you don’t need complex tests to raise suspicion. In clinical practice, the most powerful clues come from truly listening to and observing the person in front of us—not just relying on numbers or images.

Anecdotally, even those without medical training can often sense when something is off; I recall times when my husband, not a clinician by any means, has looked at a patient and said, “I think this might be PCOS.” And more often than not, his intuition aligns with pointers that would lead me to query a possible diagnosis.

Two of the most common visible signs include:

Excessive hair growth (hirsutism): It’s estimated that 70 to 80% of cysters have significant facial or body hair growth. This results from higher androgen levels affecting hair follicles. If this resonates with you, it’s worth discussing with your trusted healthcare provider. It’s a major red flag.
Acne: This is a common symptom of PCOS, particularly in adults. It affects approximately twice as many people with as without PCOS. Forty-two per cent of adults with PCOS have acne. Fifty-nine per cent of teens with PCOS have acne. Regional Finding: The link between PCOS and acne is strongest in East Asia, where PCOS cysters are 3.5 times more likely to have acne than their peers without PCOS.
Overweight or obesity: Rates of PCOS are significantly higher in cysters who are overweight and obese.

Why Diagnosis Takes Time—and Why It Matters

PCOS is a diagnosis of exclusion, meaning other similar conditions must be ruled out. This process may involve detailed history taking, physical examinations, laboratory tests, and imaging. Variability in symptoms and the overlap with other disorders mean diagnosis can be complex.

To my mind, the diagnostic criteria for PCOS are clear, and it’s a common condition (estimated in 1 in 5 women). Key red flags like weight gain, excess hair, acne, and irregular periods make it a relatively straightforward diagnosis.

The main barrier is not complexity, but a lack of education among healthcare providers.

You’re Not Alone

Often, health practitioners miss the signs or fail to perform comprehensive testing. Many with PCOS are left feeling isolated or misunderstood. That’s why being your own advocate and seeking specialists who truly understand PCOS can make all the difference.

Final Thoughts

Diagnosis is as much about clinical insight as it is about laboratory values. You know your body best, and persistent symptoms deserve thorough exploration. PCOS symptoms like excessive hair growth, moderate to severe acne, and irregular or absent menstrual cycles similarly signal a hormonal imbalance.

If you suspect PCOS, talk openly with a trusted healthcare professional. Share what you experience physically and emotionally. Getting the correct diagnosis can be the first hopeful step toward reclaiming your health. It shouldn’t be as hard as it currently is.

From PCOS to perfect health, with love,

Dr. Rebecca Harwin
The PCOS Expert
Chiropractor & Bestselling Author of
Conquer Your PCOS Naturally
www.ConquerYourPCOSNaturally.com