PCOS Symptoms (Now Called PMOS): Signs & Diagnosis

If you've ever had irregular periods, acne that won't clear, or watched unwanted hair keep appearing and wondered whether it was “just your body,” you're not alone — and it's worth understanding why. Polycystic ovary syndrome is one of the most common hormone conditions in women, yet many people live with it for years without a name for what they're experiencing. Here's what the symptoms look like, how the diagnosis actually works, and why you may hear the name PMOS going forward.

Is PCOS now called PMOS?

Yes. In May 2026, a large group of international medical societies and patient organizations agreed on a new name: polyendocrine metabolic ovarian syndrome, or PMOS. “Polyendocrine” means several hormone-making glands are involved, not just the ovaries. “Metabolic” points to the effects on things like blood sugar and weight. The old name put “cysts” front and center — but as you'll see below, the small spots doctors count on an ultrasound aren't really cysts, and that one word led plenty of people to picture the wrong condition.

The condition itself hasn't changed: same symptoms, same tests, same treatments. You'll see both names for a while, since the switch is rolling out over about three years — your chart and lab orders may still say PCOS. This article mostly says PCOS, because that's still the term you're most likely to hear.

What are the most common PCOS symptoms?

The two core symptoms are irregular periods and signs of high androgens — hormones like testosterone that everyone makes, but that cause visible changes at higher levels.

Period changes usually start in the teen years, around the time periods first begin. The most typical pattern is oligomenorrhea, meaning fewer than nine periods in a year. Some women have amenorrhea — no period for three months or longer. Cycles often become more regular after age 40. If irregular periods first appear well after age 30, this is a less likely explanation, and your doctor will look closely at other causes.

Signs of high androgens can show up on the skin and hair:

• Hirsutism — coarse, dark hair growing in a male-type pattern, such as the upper lip, chin, chest, or lower belly
• Acne
• Male-pattern hair loss, meaning thinning at the temples or crown of the scalp

How much hair growth counts as “too much” varies between ethnic backgrounds. Many East Asian and Native American women naturally have very little body hair, so even a small amount of new facial hair can be a meaningful clue.

Many women with PCOS also carry extra weight and don't respond to insulin normally — this is called insulin resistance, and it happens in lean women too. Depression and anxiety are more common as well. None of these are required for the diagnosis, but they matter for your care.

One important flag: if heavy hair growth appears suddenly and worsens fast, or you notice changes like a deepening voice, see a doctor promptly. Those signs point away from PCOS and need a different, more urgent workup.

How is PCOS diagnosed?

Most doctors use a checklist called the Rotterdam criteria. You need two out of these three findings: (1) irregular or absent ovulation, usually showing up as irregular or missed periods; (2) signs of high androgens — either visible ones like hirsutism or acne, or high androgen levels on a blood test; and (3) polycystic-appearing ovaries on an ultrasound.

One more step is required: your doctor must rule out other conditions that can look the same. The label only fits once those look-alikes are off the table.

Encouragingly, many women can be diagnosed mostly from a good conversation and an exam — irregular periods since the teen years plus visible signs of high androgens already checks two boxes.

Getting there can still take longer than it should. In a large international study, almost half of women saw three or more health professionals before being diagnosed, and for one in three it took over two years. If specialists are far away — a real barrier in many rural and mountain-town parts of Colorado — telehealth can remove the drive and shorten that wait.

What blood tests are used to diagnose PCOS?

Blood tests do two jobs: confirm high androgen levels, and rule out the look-alikes. Depending on your symptoms, testing often includes:

• Total testosterone. The main androgen test, best measured with a lab method called LC-MS/MS, which is more accurate for women than the standard hospital assay. A very high level triggers a search for rarer causes.
• 17-hydroxyprogesterone. A morning blood test that screens for a genetic adrenal condition called nonclassic congenital adrenal hyperplasia (NCCAH), which can copy this condition almost exactly.
• Tests for other causes of irregular periods. Typically a pregnancy test, prolactin, thyroid testing (TSH), and FSH. You may have heard of an “LH-to-FSH ratio” — that was never an official part of the diagnosis and can mislead.

Timing matters. Birth control pills, metformin, and spironolactone all lower androgen levels, so hormone testing isn't reliable while you're taking them. Doctors usually ask patients to pause them for four to six weeks beforehand — but only make a change like that with your doctor's guidance.

Do I need an ultrasound to be diagnosed?

Not always. If you already have both irregular periods and clear signs of high androgens — and other causes have been ruled out — you meet the criteria without any imaging.

An ultrasound is most useful when only one of the first two boxes is checked. When it's done, a transvaginal ultrasound (an internal pelvic ultrasound) works best. Doctors aren't looking for true cysts — they're counting follicles, the small sacs that hold eggs, and measuring ovary size. The classic threshold is 12 or more small follicles in an ovary, or an ovary larger than 10 milliliters, though experts have proposed newer cutoffs.

Here's the fact that surprises people, and a big reason the name changed: polycystic-looking ovaries alone don't mean you have this condition. Plenty of women with normal cycles have that same appearance. If ovaries look polycystic on a scan but you have regular periods and no androgen symptoms, no further workup is needed.

What happens after diagnosis?

A diagnosis is a starting point, because this condition travels with health risks that deserve attention — rates of insulin resistance and type 2 diabetes are higher, whether or not weight is elevated.

Doctors typically check blood pressure, body mass index, and waist size, order a fasting cholesterol panel, and arrange a two-hour oral glucose tolerance test — a sugary-drink test that catches early blood sugar problems a simple fasting test can miss. Short screening questionnaires for depression and anxiety are recommended too, along with questions about snoring and daytime sleepiness, since sleep apnea is common.

If pregnancy is a goal, cycles more than 35 days apart suggest you're not ovulating regularly — very workable, but worth raising early.

Frequently asked questions