A major shift has taken place in women’s health and reproductive medicine.
Polycystic Ovary Syndrome (PCOS), one of the most common hormonal conditions affecting women worldwide, has officially been renamed PMOS – Polyendocrine Metabolic Ovarian Syndrome.
The updated terminology was announced following years of international research, clinical review, and collaboration between healthcare professionals and patient advocacy groups. According to the published consensus, the previous name no longer accurately reflected the complexity of the condition.
At Vitalab Fertility Clinic, fertility specialist Dr Yossi Unterslak recently unpacked what this important change means for women living with the condition — particularly regarding fertility, metabolism, hormones, and long-term health.
Why Was PCOS Renamed?
For many years, the term Polycystic Ovary Syndrome caused confusion.
As Dr Yossi explained, women with PCOS do not actually have ovarian cysts in the traditional sense. Instead, the ovaries often contain a higher number of follicles or egg sacs. The previous name placed too much focus on the ovaries alone, while overlooking the broader hormonal and metabolic nature of the condition.
The new term — Polyendocrine Metabolic Ovarian Syndrome (PMOS) — better reflects what doctors and researchers now understand about the condition:
- Polyendocrine → multiple hormone systems are involved
- Metabolic → insulin resistance and metabolic health play a significant role
- Ovarian → the ovaries are involved, but are not the sole cause of the condition
The updated name aims to improve awareness, reduce misunderstandings, and encourage more comprehensive treatment approaches.
PMOS Is More Than a Fertility Condition
PMOS affects far more than ovulation or menstrual cycles.
Research now recognises that the condition can impact:
- Hormone balance
- Insulin resistance
- Weight regulation
- Cardiovascular health
- Skin and hair health
- Emotional wellbeing
- Fertility and ovulation
According to the international consensus document, PMOS affects approximately 1 in 8 women globally.
Common symptoms may include:
- Irregular or absent periods
- Difficulty conceiving
- Acne or oily skin
- Excess facial or body hair
- Hair thinning or hair loss
- Weight gain or difficulty losing weight
- Fatigue
- Signs of insulin resistance
Symptoms vary significantly from person to person, which is one reason why diagnosis can sometimes be delayed.
How Is PMOS Diagnosed?
The diagnosis criteria remain largely based on the internationally recognised Rotterdam Criteria.
A diagnosis may be made when a woman presents with at least two of the following:
- Irregular or absent ovulation
- Signs of elevated androgen (male hormone) levels
- Polycystic or multi-follicular ovaries seen on ultrasound
As Dr Yossi highlighted in his discussion, the important shift is not necessarily the diagnostic process itself — but rather a broader understanding of the condition as a multisystem health disorder, not simply an ovarian issue.
What Does PMOS Mean for Fertility?
Many women with PMOS are still able to conceive naturally or with fertility treatment support.
However, because PMOS can affect ovulation, some women may experience difficulty falling pregnant. Treatment depends on each patient’s symptoms, reproductive goals, and overall health profile.
International guidelines now emphasise:
- Lifestyle support and metabolic health
- Ovulation induction when needed
- Individualised fertility treatment plans
- Psychological wellbeing and emotional support
- Long-term monitoring of cardiovascular and metabolic health
Dr Yossi also noted that treatment approaches remain tailored according to whether a woman is currently trying to conceive or whether symptom management is the primary focus.
Why This Change Matters
Language in medicine matters.
For many women, the previous term “PCOS” created confusion, frustration, and sometimes delayed understanding of what was really happening in their bodies.
The transition to PMOS represents a move toward:
- More accurate education
- Better metabolic screening
- More personalised treatment
- Greater awareness of long-term health risks
- A more holistic approach to women’s health
Importantly, the name change also validates what many patients have experienced for years: that this condition affects much more than fertility alone.
When Should You Seek Medical Advice?
If you are experiencing:
- Irregular periods
- Difficulty conceiving
- Persistent acne or unwanted hair growth
- Sudden weight changes
- Symptoms of insulin resistance
- Ongoing hormonal concerns
it may be worth speaking to a fertility specialist or healthcare provider for assessment.
Early diagnosis and support can help improve both reproductive and long-term health outcomes.
Fertility Support at Vitalab
At Vitalab Fertility Clinic, our team understands that hormonal and fertility conditions can affect every woman differently.
Our specialists provide evidence-based fertility care, personalised treatment planning, and ongoing support tailored to each patient’s individual needs and goals.
To learn more or book a consultation, visit Vitalab Fertility Clinic
Sources:
International PMOS naming consensus and diagnostic criteria update, May 2026.
Discussion by Dr Yossi Unterslak regarding the PMOS terminology update and implications for fertility care.