PCOS (Now Called PMOS): A Leading Cause of Female Infertility

If you’ve been diagnosed with polycystic ovary syndrome — or if you just heard the news that PCOS now has a new name — you’re in the right place for expert fertility care. PCOS, now officially known as PMOS (polyendocrine metabolic ovarian syndrome), is one of the most common causes of female infertility. It affects an estimated 1 in 8 women of reproductive age worldwide. The good news: with the right care, most people with PMOS can and do get pregnant.

At The Fertility Center of Las Vegas, our physicians have specialized in this condition for decades. Whether you’ve just received a diagnosis or have been managing symptoms for years, we’re here to help you understand what’s happening in your body — and what you can do about it.

PCOS was renamed PMOS on May 12, 2026, which more clearly reflects the full hormonal and metabolic nature of the diagnosis. Learn more about why the name changed and what it means.

What Does PMOS Actually Stand For?

Polyendocrine Metabolic Ovarian Syndrome

Each word is intentional:

Poly-endocrine — Multiple hormonal systems are involved. Insulin, androgens, and neuroendocrine pathways all interact.
Metabolic — Insulin resistance is a central driver, even in people who aren’t overweight. This links PMOS to risks like type 2 diabetes, gestational diabetes, and cardiovascular concerns.
Ovarian — The ovaries are part of the picture, but one piece of a much larger puzzle.

The old name of polycystic ovary syndrome (PCOS) was misleading in a fundamental way. It pointed to cysts on the ovaries — but those aren’t actually cysts. They’re small, immature follicles. And not everyone with the condition has them. More importantly, the name said nothing about the hormonal complexity or metabolic factors that drive the condition and contribute to infertility. That gap in understanding led to delayed diagnoses and fragmented care for too many patients.

The new name, PMOS, reflects the full picture: this is a polyendocrine (multi-hormonal) and metabolic condition that happens to involve the ovaries — not simply an ovarian disorder.

What Is PMOS (Polyendocrine Metabolic Ovarian Syndrome)?

PMOS is a complex hormonal condition in which the body produces an excess of androgens (often called “male hormones”), disrupting the normal hormonal signals that control ovulation. Insulin resistance is now understood to be a central driver — elevated insulin triggers androgen production, which in turn suppresses ovulation.

Common symptoms include:

Irregular, infrequent, or absent menstrual periods
Difficulty getting pregnant due to unpredictable or absent ovulation
Excess facial or body hair (hirsutism)
Thinning hair on the scalp
Acne or oily skin
Weight gain, especially around the abdomen
Dark patches of skin (acanthosis nigricans)
Skin tags on the neck or in the armpits
Insulin resistance — which may or may not be accompanied by weight changes

Because ovulation is disrupted, female infertility and difficulty getting pregnant are among the most common consequences of PMOS. The condition is also associated with longer-term health risks including type 2 diabetes, gestational diabetes, high blood pressure, and cardiovascular concerns. This is precisely why the new name — and the whole-body approach it represents — matters so much.

How Is PMOS Diagnosed?

Diagnosis hasn’t changed with the name. Your doctor will look for at least two of the following three criteria (known as the Rotterdam criteria):

Irregular or absent ovulation
Elevated androgen levels (confirmed by symptoms like excess hair or acne, or by blood test)
Polycystic ovarian appearance on ultrasound (multiple immature follicles)

Under the PMOS framework, your doctor should also assess metabolic markers — including fasting insulin, blood glucose, and a lipid panel — to understand the full hormonal picture. These tests are important even if you’re not overweight, since insulin resistance affects people of all body types.

Not sure where to start? Learn about fertility testing for women or review our patient care timeline to know what to expect.

How Is PMOS Treated?

Treatment depends on your goals and your individual hormonal profile. At FCLV, we build a plan around you — not a checklist.

If you want to conceive with PMOS (PCOS):

Lifestyle changes — For some patients, targeted changes to diet and exercise can improve insulin sensitivity, restore ovulation, and make natural conception possible. This is often a first-line recommendation regardless of weight.
Oral medications — Letrozole can stimulate ovulation and are often combined with timed intercourse or IUI.
Metformin — This medication improves insulin sensitivity and can help restore regular ovulation, particularly in patients with insulin resistance.
Artificial Insemination using intrauterine or intratubal insemination (IUI/ITI) — A gentle, minimally invasive option often used alongside ovulation-stimulating medications.
In vitro fertilization (IVF) — For patients who need more targeted support, IVF offers exceptional success rates at FCLV.

If you’re not trying to conceive right now:

Hormonal birth control to regulate your cycle and manage androgen levels
Metformin or other medications to address insulin resistance and reduce long-term health risks
Ongoing monitoring and lifestyle support to protect your future fertility

Not sure which path is right for you? Schedule a consultation with one of our physicians, or explore finding the right fertility treatment.

Ready to Take the Next Step?

FCLV has been caring for patients with PMOS — long before it had that name. Our fertility experts in Las Vegas take a whole-person approach: hormonal, metabolic, and reproductive to help you find the right fertility treatment. Because getting to the root of what’s happening is how we help you move forward.

Schedule a consultation or call us at (702) 254-1777 – we’re here for you, wherever you are in your journey.