Understanding the change from PCOS to PMOS
For many years, Polycystic Ovary Syndrome (PCOS) has been one of the most commonly diagnosed hormonal conditions affecting women of reproductive age. However, in 2026, international experts announced a major update: PCOS is now being renamed Polyendocrine Metabolic Ovarian Syndrome (PMOS).
While the symptoms, diagnosis and treatment pathways remain largely the same, the new terminology reflects a better understanding of the condition and its impact on the whole body, not just the ovaries.
At Manchester Fertility, we know that many patients may feel confused by this change, especially if they have recently been diagnosed with PCOS or are currently undergoing fertility treatment. This guide explains why the name has changed, what PMOS means, and how this condition can affect fertility.
Why has PCOS been renamed?
The term “Polycystic Ovary Syndrome” has long been considered ‘misleading’ by many healthcare professionals and patients.
Despite the name:
- Not everyone diagnosed with PCOS has ovarian cysts
- The condition affects much more than the ovaries
- Symptoms can include metabolic, hormonal and psychological effects
- Many people experience insulin resistance, weight changes and inflammation alongside fertility issues
The updated name, Polyendocrine Metabolic Ovarian Syndrome (PMOS), aims to reflect the complexity of the condition.
The word:
- Polyendocrine highlights that multiple hormone systems are involved
- Metabolic recognises the strong link between insulin resistance and metabolic health
- Ovarian acknowledges the effect on ovulation and reproductive health
Ultimately, the name change is designed to improve awareness, reduce misunderstanding and encourage earlier diagnosis and more personalised care.
What symptoms are associated with PMOS?
Although the name has changed, the symptoms patients experience remain the same.
Common symptoms include:
- Irregular or absent periods
- Difficulty ovulating
- Acne or oily skin
- Excess facial or body hair
- Weight gain or difficulty losing weight
- Hair thinning or hair loss
- Insulin resistance
- Fertility challenges
- Mood changes or anxiety
Symptoms can vary significantly from person to person, which is why personalised fertility care is so important.
How does PMOS affect fertility?
PMOS remains one of the leading causes of ovulation-related infertility.
Many patients with PMOS experience irregular ovulation or may not ovulate consistently at all. Without regular ovulation, conceiving naturally can become more difficult.
However, having PMOS does not mean pregnancy is impossible.
At Manchester Fertility, we support many patients with PMOS through tailored fertility treatment plans designed around their individual hormone levels, ovarian reserve and reproductive health.
Depending on your situation, treatment options may include:
- Lifestyle and nutritional support
- Ovulation induction medication
- Ultrasound and hormone monitoring
- Intrauterine insemination (IUI)
- IVF treatment
- Support to reduce the risk of ovarian hyperstimulation syndrome (OHSS)
Is PMOS diagnosed differently?
At present, the diagnostic criteria remain largely unchanged.
Doctors typically assess a combination of:
- Irregular ovulation or menstrual cycles
- Signs of elevated androgen hormones
- Ultrasound appearance of the ovaries
Additional blood tests may also be recommended to evaluate hormone levels, insulin resistance and overall reproductive health.
At Manchester Fertility, fertility assessments are tailored to each patient. This may include ultrasound scans, AMH testing and consultations with one of our experienced fertility specialists.
Why the name change matters
For many patients, the shift from PCOS to PMOS is about more than terminology.
The previous name often caused confusion and stigma. Some people worried they had ovarian cysts when they did not, while others struggled to understand why symptoms such as fatigue, insulin resistance or weight changes were connected to the condition.
The updated term helps reinforce that PMOS is a complex hormonal and metabolic condition requiring whole-body care.
It may also help:
- Improve awareness among healthcare professionals
- Encourage earlier diagnosis
- Expand research into treatment options
- Support more holistic patient care
- Improve understanding of long-term health risks
Support for patients with PMOS at Manchester Fertility
Whether you have recently been diagnosed with PMOS or have been living with PCOS for years, our experienced team is here to help you understand your options and create a treatment plan tailored to your needs.
We combine advanced fertility expertise with personalised support to help patients feel informed, reassured and empowered throughout their journey.
Book a fertility consultation
If you have questions about PMOS, ovulation or your fertility options, our team is here to support you.
Book a consultation or free 1-2-1 discovery appointment to speak with one of our fertility specialists:
Last updated: 8th June 2026
