PCOS is being renamed PMOS: What the new name means and why it matters

You may have heard that PCOS is being renamed PMOS. 

PMOS stands for Polyendocrine Metabolic Ovarian Syndrome. It is the new name for the condition previously known as PCOS, or Polycystic Ovary Syndrome. 

The condition itself has not changed. The new name is intended to better describe what is really going on in the body and to support better understanding, diagnosis and care. 

Why is the name changing from PCOS to PMOS? 

For many years, PCOS has been a confusing name. 

The word “polycystic” suggests the condition is mainly about cysts on the ovaries. However, this does not reflect the full picture. Not everyone with the condition has polycystic ovarian appearance on ultrasound, and the small fluid-filled structures seen on ovaries are follicles rather than typical ovarian cysts. 

PMOS is considered a more accurate name because it highlights that this is a condition involving multiple body systems, including hormones, metabolism and ovarian function. 

What does PMOS mean? 

PMOS stands for Polyendocrine Metabolic Ovarian Syndrome. 

Here’s what that means in simple terms: 

Polyendocrine means that more than one hormone system may be involved. PMOS can affect hormones that influence periods, ovulation, skin, hair growth, appetite, energy, mood and more. 

Metabolic refers to how the body processes and uses energy, including blood sugar and insulin. Many people with PMOS have some degree of insulin resistance or increased metabolic risk, which can make weight, cravings, energy levels and long-term health more challenging. 

Ovarian recognises that the ovaries can still be involved, particularly when it comes to ovulation, menstrual cycles and fertility. 

Syndrome means there is a collection of signs and symptoms that can vary from person to person. 

What symptoms can PMOS cause? 

PMOS can look different for different people. Common symptoms and health concerns can include: 

• Irregular or absent periods 

• Difficulty with ovulation or fertility 

• Acne or oily skin 

• Excess facial or body hair 

• Hair thinning on the scalp 

• Weight gain or difficulty managing weight 

• Cravings or changes in appetite 

• Insulin resistance or blood sugar concerns 

• Increased risk of type 2 diabetes over time 

• Mood changes, anxiety or low mood 

• Fatigue or low energy 

• Sleep concerns, including increased risk of sleep apnoea 

Some people may have several of these symptoms, while others may only have a few. Diagnosis should always be made by an appropriately qualified health professional, as other conditions can cause similar symptoms. 

Why the name matters 

The move from PCOS to PMOS is about more than wording. 

A clearer name may help people understand that this condition is not simply about the ovaries, and it is not simply about fertility. It can affect whole-body health, including hormones, metabolism, skin, mood, energy, sleep and long-term wellbeing. 

This broader understanding can also help reduce stigma. Many people with PMOS have felt dismissed, blamed or confused about their symptoms. A more accurate name can support better conversations and more individualised care. 

How nutrition and lifestyle support can help 

Nutrition and lifestyle support can be helpful because food, eating patterns, movement, sleep and everyday habits can influence blood sugar regulation, insulin resistance, inflammation, energy levels, appetite, mood and overall wellbeing. 

At Mission Nutrition, our Dietitians and Nutritionists can help you understand what may be happening in your body and create a practical, realistic plan that supports your health, symptoms and goals. 

Support may include: 

• Balancing meals to support blood sugar and energy 

• Improving protein, fibre and nutrient intake 

• Supporting insulin resistance and metabolic health 

• Managing cravings and appetite changes 

• Supporting weight management in a non-judgemental way 

• Reviewing supplement use where appropriate 

• Supporting gut symptoms or digestive concerns 

• Helping you build sustainable habits without restrictive dieting 

• Supporting sleep, movement and lifestyle routines that work in real life 

PMOS and other women’s health concerns 

Many women experience overlapping symptoms or multiple health concerns at once. Alongside PMOS, we also support people with endometriosis, perimenopause, menopause, thyroid concerns, gut issues, weight management, fatigue and general wellbeing. 

If you are unsure where to start, individualised support can help you make sense of your symptoms and take practical steps towards feeling better. Our team are here to help.