Polycystic ovary syndrome spent decades named after cysts that plenty of people with it never had. In May 2026 that finally changed. A global consensus led by Monash University in Melbourne and published in The Lancet renamed it polyendocrine metabolic ovarian syndrome. PMOS for short, because nobody's saying the full thing at brunch. The new name is longer. It's also closer to the truth, since this is a hormone and metabolic condition with the ovaries in the mix, and the cysts were only ever a supporting character. What the rename can't do is make the early signs any easier to spot. So this is what to look for, and when a GP appointment beats another month of guessing.
PCOS is now PMOS. What changed?
The name, and it took a while. Polyendocrine metabolic ovarian syndrome was 14 years and more than 22,000 survey responses in the making. Worth it. The old name sent everyone hunting for cysts. The new one points at what's going on underneath, which is a hormone condition (polyendocrine) with a metabolic side (think insulin) that shows up in your ovaries and your cycle. Syndrome is the medical word for a bunch of signs that travel together.
If you're already diagnosed with PCOS, nothing's been cancelled. It just got a rebrand, and a better one than most. Both names will be in circulation for the next few years, with the international guideline making the full switch in its 2028 update. So if your GP still says PCOS, they're right on schedule.
What is PCOS (now PMOS), in plain terms?
It's a hormonal condition where the ovaries can make higher levels of androgens (often called male hormones, though everyone has them) and ovulation can turn irregular or skip altogether. You don't need visible cysts to have it, which is exactly why the name had to go. Around 1 in 8 women live with it, according to Monash University, and it shows up differently in almost every one of them. The WHO estimates up to 70% of women with it don't know they have it. That's how easily it gets missed. Model and artist Brodie Halford shared what that looked like for her in her PCOS story.
What are the early signs of PCOS?
No two people get the same set, but these are the ones that tend to turn up first:
- Irregular, unpredictable or missing periods
- Acne or oilier skin that shrugs off your usual products
- Extra hair growth on the face or body, or thinning hair on the scalp
- Weight that shifts or sticks when nothing else has changed
- Energy dips or mood changes
One or two on their own might be nothing. A cluster of them, especially alongside an irregular cycle, is worth getting checked.
Can you have PCOS with regular periods?
You can. Some people with PCOS still get a fairly regular cycle, and that's how it slips under the radar for years. If you've got other signs, like skin or hair changes that won't quit, don't rule it out just because your period shows up on time. Ask anyway. Punctuality isn't a diagnosis.
Does PCOS affect fertility?
It can make things less predictable, because ovulation can be irregular. It doesn't automatically mean you can't get pregnant. If you're trying, planning to or already pregnant, check with your doctor. Getting a diagnosis sooner means more information and more options, and that conversation belongs with someone who can see your bloods.
How is PCOS diagnosed?
There's no single test. A GP or gynaecologist looks at your cycle history, does a physical check, orders blood tests for hormone levels and sometimes sends you for an ultrasound. Because it's a pattern you piece together over months, tracking your cycle and symptoms before the appointment helps a lot. Bring the receipts. More on irregular periods.
What can help you manage PCOS?
Management is personal, and it's something to work through with a professional. Common approaches include movement you actually like, nutrition, sleep and stress support, plus medical options where they're needed. For the day-to-day, unpredictable cycles are easier to live with when your period underwear can handle a surprise. Heat is part of a lot of people's cramp-day kit, and rae makes it wearable, so you're not stuck on the couch with a hot water bottle going cold. None of this replaces medical care. Nothing here is a cure. It's there for the everyday bits.
Quick answers
Q: Is PCOS the same as PMOS?
A: Yes. PMOS (polyendocrine metabolic ovarian syndrome) is the new name for PCOS, published in The Lancet in May 2026. Both names will be used for a few years while the switch happens.
Q: Why was PCOS renamed?
A: The old name suggested the condition was about ovarian cysts, which many people with it don't have. The new name reflects its hormone and metabolic sides.
Q: What are the first signs of PCOS?
A: Commonly irregular or missing periods, acne or oily skin, extra hair growth or scalp thinning, and weight or energy changes. A cluster of these with an irregular cycle is worth checking.
Q: Can you have PCOS and still get regular periods?
A: Yes. Some people with PCOS have regular cycles, which is why it's often missed. If you have other signs, ask your GP anyway.
Q: Does PCOS mean I can't have children?
A: Not automatically. PCOS can make ovulation less predictable. If you're planning a pregnancy, check with your doctor.
Q: How is PCOS diagnosed?
A: There's no single test. A GP looks at your cycle history, symptoms, blood tests and sometimes an ultrasound. Tracking your symptoms first helps. Speak to your GP.
Shop Period Underwear for unpredictable cycles and rae, the wireless heat pad, for cramp days. Magnesium+ Spray is there for the wind-down.