Polycystic ovary syndrome (PCOS) is a hormonal and metabolic condition that, despite popular belief, impacts way more than menstrual cycles. The effects of PCOS can show up all over your body, from skin issues and mood swings to weight gain and infertility. When left untreated, the condition can also impact your general quality of life. Suddenly, you find yourself frustrated, confused, and disconnected from your own body.
That’s exactly why getting a proper diagnosis matters. When PCOS goes undiagnosed, symptoms often get brushed off as stress, weight changes, or just “getting older.” Meanwhile, you aren’t even aware that you can target symptoms at the root. Over time, unmanaged PCOS leaves you at an increased risk of heart disease, type 2 diabetes, blood pressure issues, sleep apnea, and other long-term complications.
But when you know what you’re dealing with, you can actually do something about it. A diagnosis gives you clarity—and clarity gives you direction. That’s exactly why I’m using this post to discuss the process of detecting and diagnosing PCOS.
Here’s what you need to know:
How Many Women Have PCOS and How Is It Diagnosed?
Between 6% and 13% of women worldwide have polycystic ovary syndrome (PCOS). That might sound like a small percentage, but it actually makes PCOS one of the most common hormonal disorders, impacting millions of women. On top of that, some estimates suggest that up to 70% of women with PCOS remain undiagnosed. That means the true number is likely even higher than we realize.
In this post, we’re going to talk about why getting a PCOS diagnosis can be so difficult and walk through exactly how doctors determine whether you have it. And if you’re in the middle of this process, feeling confused or dismissed, please know you are not alone. So many women are right there with you!
If you want to hear a real-life story, listen to our episode of A Cyster and Her Mister featuring Kail Lowry, who recently confirmed she has PCOS. We talk through her diagnosis experience step by step, and it’s such a helpful episode if you’re navigating the same things.
Can PCOS Be Misdiagnosed?
Yes, PCOS is often misdiagnosed. It’s a complex condition, and because it affects both metabolism and hormones, the range of possible symptoms is broad. These symptoms can also vary significantly from person to person (depending on age, lifestyle, and other individual factors).
Because of this, many doctors (and patients) focus on managing individual symptoms rather than identifying the root cause. Treatment often jumps straight to prescriptions like hormonal birth control pills, GLP-1 medications, antidepressants, anti-androgens, and more. On the other end of the spectrum, some doctors do not intervene at all. Instead, they write off symptoms as side effects of stress, weight changes, or aging.
Beyond the symptom overlap, there is no single test that can definitively diagnose PCOS. Many women with PCOS receive seemingly “normal” hormone panel results on standard blood work. Hormone reference ranges are extremely broad, and a value can fall within an “acceptable” range while still sitting at the high or low end of the spectrum and contributing to symptoms.
In addition to this, not all providers closely evaluate these patterns. Some commonly ordered tests may not even be sensitive enough to capture what’s actually happening hormonally.
Because of these diagnostic challenges, doctors frequently misdiagnose PCOS as one of the following health problems (or left unexplained altogether):
- Thyroid Disorders
- Hypothalamic Amenorrhea (HA)
- Hyperprolactinemia
- Congenital Adrenal Hyperplasia (Non-Classic CAH)
- Cushing’s Syndrome
- Primary Ovarian Insufficiency (POI)
- Insulin Resistance (Without PCOS)
- Androgen-Secreting Ovarian or Adrenal Tumors
- Endometriosis
Many people get that last one and polycystic ovary syndrome confused. To help you understand the difference, read my post on endometriosis vs PCOS.
How to Know If You Have PCOS
Getting diagnosed with PCOS can take time. But it’s great that you’re advocating for yourself, doing your own research, and continuing to fight for answers. For a full breakdown on diagnostics, read my guide on how to know if you have PCOS. But, for a brief overview, here are some of the most common issues and symptoms of PCOS:
- Elevated androgen (male hormone) levels on blood work
- Insulin resistance or blood sugar issues
- Ovarian cysts visible on ultrasound
- Irregular, infrequent, or missing periods
- Difficulty ovulating or trouble getting pregnant
- Excessive facial or body hair growth (chin, jawline, chest, stomach)
- Hormonal acne, especially along the jawline or cheeks
- Thinning hair on the scalp or hair loss
- Unexplained or stubborn weight gain
- Strong cravings and frequent hunger, especially for carbs or sugar
- Darkened skin patches (often on the neck, underarms, or groin)
- Fatigue or low energy despite adequate sleep
- Mood swings, anxiety, or depression
How Is PCOS Diagnosed?
Step 1: Review medical history and symptoms.
When it comes to figuring out whether PCOS may be part of the picture, doctors don’t rely on a single test or symptom. Instead, they look at your health history as a whole. They analyze how your symptoms show up, how long they’ve been happening, and whether certain patterns keep repeating.
Taking time to review common PCOS symptoms can be especially helpful, since many are easy to brush off or assume are “normal.” A healthcare provider can then connect the dots, order the right tests, and determine whether PCOS is the most likely explanation.
Here’s everything doctors will review in your medical history:
- Current Symptoms: Your doctor will start by asking about the symptoms you’re experiencing now. This often includes irregular periods, acne, hair changes, weight fluctuations, or energy issues. These details help identify patterns that may point toward PCOS.
- Family History: A history of PCOS, diabetes, hormone disorders, or metabolic conditions in close relatives can increase the likelihood of PCOS and help your doctor assess genetic risk.
- Pre-Existing Conditions: Conditions like insulin resistance, prediabetes, thyroid disorders, sleep apnea, or previous fertility challenges are important to note. These can all overlap with a PCOS diagnosis! (Here’s more on PCOS and sleep apnea.)
- Medications: Your doctor will review current and past medications, including hormonal birth control, fertility treatments, or supplements. These could be masking your symptoms or even triggering certain side effects, so they’re worth considering.
- Lifestyle Factors: Sleep, stress levels, exercise habits, and nutrition all provide context for your symptoms. They can also help your doctor understand how your day-to-day routine may be influencing your hormones.
Step 2: Conduct a physical exam.
Next, your doctor will do a physical exam to identify visual signs of PCOS. This is usually pretty quick and non-invasive. Instead of focusing on anything intense, they’ll often pay attention to external cues that may reflect hormonal imbalances, inflammation, or insulin resistance.
Here’s what they’ll look for:
- Disproportionate weight distribution on the abdomen (PCOS belly)
- Acne or ongoing breakouts
- Darkened skin patches
- Skin tags
- Extra facial or body hair
- Hair thinning on the scalp
- Swelling and redness
Step 3: Order comprehensive blood work.
If enough signs are pointing to PCOS, the next step is blood tests. How comprehensive those labs are really depends on the kind of doctor you’re seeing. For example, your primary care provider likely won’t run as many detailed hormone and metabolic markers as an endocrinologist would.
If you prefer, you can also order testing directly from online providers! That allows you to do everything from home. I love this lab bundle from EquiLife that measures ALL the key hormone and metabolic data associated with PCOS (and you can get it 50% off). Regardless of the route you take, here’s what you’ll want to have measured:
- T3 & T4 (Thyroid)
- Estrogen
- Progesterone
- Testosterone
- DHEA
- Vitamin D2 & D3
- Insulin
- Cortisol (TSC)
- HbAlc (Blood Sugar)
Step 4: Rule out other conditions.
Once a doctor has reviewed your lab panel and medical history, the next step is to rule out other conditions. This can take some time, but having the right diagnosis is essential for your healing journey! For a detailed breakdown of similar conditions, read my post on what can be mistaken for PCOS.
Step 5: Perform a pelvic ultrasound (if needed).
At this point, your doctor may order a pelvic ultrasound. Not all women with PCOS have polycystic ovaries. But if they’re present on the ultrasound, it can make confirming your diagnosis easier.
During the ultrasound, the technician will look for what’s called polycystic ovarian morphology. This is just the clinical term for the classic “string of pearls” appearance. Basically, instead of one follicle fully maturing and releasing an egg, a PCOS body often develops a bunch of smaller, underdeveloped follicles.
This usually happens because higher androgen levels interfere with normal ovulation. On the screen, those tiny follicles tend to line up around the edge of the ovary, giving it that pearl-like look.
Step 6: Apply the Rotterdam Criteria.
Now that your healthcare provider has acquired all this information, they’ll likely apply the Rotterdam Criteria. This states that for a PCOS diagnosis to happen, 2 of the 3 scenarios must be present:
- Irregular or absent ovulation
- Clinical or laboratory signs of hyperandrogenism
- Polycystic ovaries on the ultrasound
Even if they don’t explicitly say “we’re using the Rotterdam Criteria,” they’re still evaluating you through that framework. That said, not all providers have the same level of training or experience with PCOS.
Some doctors, especially endocrinologists or reproductive specialists, tend to look more closely at the deeper hormonal context beyond the baseline criteria. Others may take a more surface-level approach and only flag obvious abnormalities.
PCOS is a common hormonal condition, but that doesn’t make it easy to diagnose!
If you’re walking through this process right now, I know it can feel confusing and even discouraging at times. But please remember, you are allowed to ask questions. You are allowed to request more testing. You are allowed to look at your actual lab numbers and not just accept “everything looks normal” as the final answer.
Not every provider has the same depth of education on PCOS, and that’s okay. It just means you may need to advocate for yourself a little more. Keep learning. Track your symptoms. Do your research. And if something doesn’t sit right, get another opinion.
You deserve answers. You deserve to feel good in your body. And you deserve a provider who takes the time to look at the full picture. And, of course, as you’re going through this process, know that we’re here for you! Join The Cysterhood for resources, helpful tools, and, most importantly, a community as you navigate your healing journey.
