05 August 2026: PCOS vs. PMOS: What the new name means for your fertility | Women's Agenda
Insights from:
Key takeaways
- PCOS has been renamed Polyendocrine Metabolic Ovarian Syndrome (PMOS) to better reflect the condition's hormonal and metabolic nature.
- The name change aims to improve understanding and diagnosis, recognising that the condition affects much more than the ovaries.
- PMOS affects around 10–15% of women of reproductive age and can influence ovulation, fertility and long-term health.
- Many people with PMOS can conceive naturally, while others may benefit from treatment to support ovulation or improve fertility.
- Genea Fertility Specialist Dr Becky Taylor explains why an accurate diagnosis is important for helping people access the right care and support.
Polycystic Ovary Syndrome (PCOS) has been renamed Polyendocrine Metabolic Ovarian Syndrome (PMOS) following international consensus recommendations aimed at improving understanding of the condition.
The updated name reflects a better understanding of PMOS as a complex hormonal and metabolic disorder, rather than one defined by ovarian cysts. It also recognises that the condition can affect much more than fertility, with potential impacts on metabolic health, skin, weight and overall wellbeing.
In a recent feature published by Women's Agenda, Genea Fertility Specialist Dr Becky Taylor discussed why the condition has been renamed and what the change means for diagnosis, fertility and long-term health.
A transition period is in place until 2028 while the new terminology is adopted across healthcare and medical literature, helping patients and healthcare professionals become familiar with the updated name.
For people trying to conceive, understanding what PMOS is, and what it isn't, is an important step towards receiving the right diagnosis and appropriate care.
According to Dr Taylor, the previous name often created unnecessary confusion for both patients and healthcare providers.
Dr Taylor says the previous terminology sometimes led to people being incorrectly diagnosed after an ovarian cyst was identified on an ultrasound, despite not meeting the diagnostic criteria for the condition.
"The name Polycystic Ovary Syndrome led many people to believe the condition was simply caused by ovarian cysts, when in reality it is a much broader hormonal and metabolic disorder," says Dr Taylor.
"The change to PMOS better reflects the complexity of the condition and may help improve awareness, diagnosis and long-term care."
Why has the name changed?
For many years, the name Polycystic Ovary Syndrome suggested the condition was caused by ovarian cysts. However, Dr Taylor explains that what doctors typically see on ultrasound are multiple small follicles, not ovarian cysts.
These follicles contain immature eggs and are a feature of the condition, but they are different from the ovarian cysts many people commonly associate with the previous name.
Renaming the condition to Polyendocrine Metabolic Ovarian Syndrome (PMOS) better reflects its endocrine (hormonal) and metabolic nature, as well as its potential impact on reproductive health and overall wellbeing.
The updated terminology is intended to improve understanding of the condition, reduce confusion around diagnosis and encourage more comprehensive care throughout a person's life.
What is PMOS?
PMOS is one of the most common hormonal conditions affecting women of reproductive age, with an estimated 10–15% meeting the diagnostic criteria.
As Dr Taylor explains, PMOS exists on a spectrum. Some people experience only mild symptoms, while others have more significant hormonal, metabolic or reproductive symptoms.
Common symptoms may include irregular or absent menstrual cycles, acne, increased hair growth, thinning hair or difficulty managing weight. Some people have very few noticeable symptoms, while others may not realise they have the condition until they begin trying to conceive.
Diagnosis is based on a combination of clinical assessment, medical history and investigations rather than a single test.
For most adults, healthcare professionals diagnose PMOS when two of the following three features are present:
- irregular or absent ovulation
- evidence of increased androgen (male hormone) levels, either through symptoms or blood tests
- polycystic ovarian morphology on ultrasound or elevated Anti-Müllerian Hormone (AMH).
Because symptoms vary considerably between individuals, obtaining an accurate diagnosis is an important first step towards receiving appropriate care and support.
What does PMOS mean for fertility?
Although PMOS is commonly associated with infertility, many people with PMOS conceive naturally without fertility treatment.
For many people, the main challenge is not the number of eggs available but whether ovulation is occurring regularly enough to support conception.
Dr Taylor explains that many people with PMOS have a healthy ovarian reserve.
"The challenge is often not the number of eggs available, but whether ovulation is happening regularly."
If ovulation does not occur consistently, it becomes more difficult to predict the fertile window and optimise the chances of conception.
For people who ovulate regularly and have predictable menstrual cycles, PMOS may have little or no impact on fertility.
However, if your menstrual cycles are very irregular, you are unsure whether you are ovulating or you have been trying to conceive without success, speaking with your GP or a fertility specialist can help determine whether treatment may be beneficial.
In many cases, treatments such as ovulation induction can help stimulate regular ovulation and improve the chance of pregnancy.
Looking beyond fertility
One of the reasons the condition has been renamed is to better reflect that it extends beyond reproductive health.
While PMOS is commonly discussed in the context of fertility, it is also associated with a range of hormonal and metabolic conditions. Dr Taylor explains that people living with PMOS may experience insulin resistance, type 2 diabetes, high cholesterol, obesity, hypertension and an increased risk of cardiovascular disease.
PMOS can also affect other aspects of wellbeing, including weight management, skin health and mental health. Because the condition presents differently from person to person, recognising its broader health impacts can help ensure people receive the most appropriate care and ongoing support.
Improving awareness and diagnosis is one of the key goals behind the move from PCOS to PMOS, helping more people understand the condition and access the care they need throughout different stages of life.
When should you speak to a fertility specialist?
Although many people with PMOS conceive without medical assistance, others may benefit from further assessment and treatment, particularly if ovulation is irregular.
If your menstrual cycles are irregular, you are unsure whether you are ovulating, or you have been trying to conceive without success, speaking with your GP or a fertility specialist can help determine whether treatment may be beneficial.
At Genea, our fertility specialists provide personalised assessment and evidence-based care for people living with PMOS. Depending on your individual circumstances, treatment may include lifestyle support, ovulation induction or other fertility treatments designed to improve the chance of pregnancy.
Every fertility journey is different, and treatment recommendations should always be tailored to your medical history, symptoms and family-building goals.
About the authors
Dr. Rebecca (Becky) Taylor
Fertility Specialist MBChB (Hons), BMedSci (Reproductive Biology), EADTM&H, DCH, FRANZCOG
Dr Becky Taylor offers comprehensive fertility & endometriosis care in Sydney. AGES-certified specialist combining surgery with IVF at Genea.
View profile
Talk to a Fertility Concierge
If you've been diagnosed with PMOS or have questions about your fertility, our Fertility Concierge team is here to help. Whether you're looking for more information, considering your next steps or ready to book an appointment, they can answer your questions and connect you with the right Genea fertility specialist.
