Why does 'PCOS' have a new name?

Added: 2026-05-18

[00:00:00]Polycystic ovarian syndrome, or PCOS, has finally got a new name because it turns out these aren't cysts at all.

[00:00:08]PCOS will now be known as PMOS, which is polyendocrine metabolic ovarian syndrome. PCOS occurs in about one in eight women, and the ultrasounds of those who are diagnosed appear to have dark spots covering their ovaries, which are identified as cysts that have a risk of bursting, hence the polycystic ovary part of PCOS. However, this is actually a huge misconception, and the dark spots are actually eggs that have been unable to mature fully and be released via ovulation, not because their ovaries are riddled with cysts, but actually because they have an overabundance of eggs. And this makes it difficult for an egg to find its way out to be released. So, this disruption of egg development and ovulation is what causes the symptoms of irregular or absent periods, and why it may take longer to become pregnant as eggs are released less often.

[00:01:06]Although, 80% of women with PMOS conceive without medication or IVF.

[00:01:12]There's also been a positive new study recently that found that those with the condition can experience delayed perimenopause and menopause, which actually allows them to become pregnant at an older age and could increase their life expectancy. Another important development with this name change is recognizing that the condition affects the whole body, and so by switching it to polyendocrine metabolic draws much-needed attention to the metabolic and hormonal dimensions of the condition that have nothing really to do with the ovaries. Endocrinologist Helena Teede at Monash University has spent 14 years leading the campaign for a change of name, looking for one that is scientifically accurate and easy to implement.

[00:01:56]Hopefully, this change will lessen some of the confusion and worry that has often accompanied diagnosis in the past and all the hard work will have been worth it.