Weight gain is one of the most common concerns among women living with Polyendocrine Metabolic Ovarian Syndrome (PMOS), previously known as PCOS. For some, the weight appears gradually over several years. Others find that once they gain weight, losing it becomes much harder than expected.
This is because PMOS also influences hormones, metabolism and the way the body processes insulin, all of which can make weight management more difficult.
Understanding why this happens can help women make informed choices about managing their health instead of chasing quick fixes that rarely work.
Why Does PMOS Affect Weight?
There is no single reason why women with PMOS gain weight. Instead, several changes within the body work together.
Insulin Resistance
One of the biggest contributors is insulin resistance, which affects many women with PMOS.
Normally, insulin helps move glucose from the bloodstream into the body’s cells, where it is used for energy. When the body becomes resistant to insulin, it needs to produce more of the hormone to achieve the same effect.
Higher insulin levels encourage the body to store more fat, particularly around the waist. They may also increase appetite and cravings for refined carbohydrates, making it easier to consume more calories than intended.
Insulin resistance is also linked to an increased risk of prediabetes and type 2 diabetes if left unmanaged.
Hormonal Imbalances
PMOS is characterised by higher levels of androgens, hormones that can interfere with ovulation and menstrual cycles.
These hormonal changes may also affect how fat is distributed throughout the body. Many women develop more fat around the abdomen, which is associated with a greater risk of cardiovascular disease and other metabolic conditions.
Inflammation and Metabolism
Researchers also believe that low-grade inflammation and differences in energy metabolism play a role.
While PMOS does not mean your metabolism is “damaged”, it may make losing weight slower compared to someone without the condition, even when both follow similar eating and exercise habits.
Does Every Woman With PMOS Gain Weight?
No, women of all body sizes can develop PMOS. Some maintain a healthy weight throughout their lives but still experience irregular periods, acne, excess hair growth or fertility problems.
Likewise, women who are overweight do not necessarily have PMOS.
This is why doctors diagnose PMOS based on a combination of symptoms, hormone levels and other investigations, rather than weight alone.
Can Losing Weight Improve PMOS?
For women who are overweight or living with obesity, even modest weight loss may improve PMOS symptoms.
Research suggests that losing around 5% to 10% of body weight may help:
- Improve insulin sensitivity
- Encourage more regular menstrual cycles
- Support ovulation
- Reduce androgen levels
- Lower the risk of type 2 diabetes and heart disease
There is no single diet or exercise programme proven to work for every woman with PMOS. Instead, experts recommend building sustainable habits that support long-term metabolic health.
When Should You See a Doctor?
If you are experiencing unexplained weight gain together with irregular periods, persistent acne, excess facial or body hair, difficulty conceiving or a family history of diabetes, it is worth speaking to your doctor.
Your healthcare provider may recommend blood tests, lifestyle support or medication depending on your symptoms and overall health.
All in all its always useful to remember that weight gain associated with PMOS is influenced by hormones, insulin resistance and metabolism. While this can make weight management more challenging, effective treatment focuses on improving long-term health rather than pursuing rapid weight loss.
Small, consistent lifestyle changes, together with appropriate medical care where needed, remain the most effective approach to managing PMOS and reducing the risk of future health complications.
Disclaimer: The information in this article is intended for general reading and awareness only. It does not replace advice from qualified medical, legal, financial, religious or other relevant professionals. If you are facing a specific concern, please speak to the appropriate expert or authority for guidance.
