Verity - The UK PCOS Charity
Verity - The UK PCOS Charity
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  • HOME
  • ABOUT
    • ABOUT US >
      • MEET OUR ADVISORS
      • MEET THE TRUSTEES
      • MEET OUR VOLUNTEERS
    • ABOUT PCOS >
      • WHAT IS PCOS
      • SYMPTOMS OF PCOS
      • WHAT CAUSES PCOS
      • LONG TERM HEALTH
      • DIAGNOSING PCOS
      • TREATING PCOS
      • PCOS MYTHS
  • SUPPORT
    • SUPPORT VERITY
    • SUPPORT FOR YOU
    • FUNDRAISING >
      • WHY FUNDRAISE
    • VOLUNTEER >
      • VOLUNTEER MYTH BUSTERS
    • TALK TO THE MEDIA
    • SOCIAL MEDIA
  • EVENTS
    • PAST EVENTS >
      • LEEDS 2018 >
        • AGENDA
        • SPEAKERS
      • LONDON 2017
      • CARDIFF 2016 >
        • AGENDA
        • SPEAKERS
    • PCOS AWARENESS MONTH
  • DONATE
  • SHOP
  • RESEARCH
    • PARTICIPATE IN RESEARCH
    • FOR RESEARCHERS
    • NEW PCOS RESEARCH
  • BLOG
  • CONTACT US
  • SUPPORTERS
  • PARLIAMENTARY DEBATE

WHAT IS PCOS?

PCOS affects 1 in 10 women  in the UK

Polycystic Ovary Syndrome (PCOS) is an endocrine disorder whereby polycystic ovaries are one of an array of possible symptoms caused by an underlying hormone imbalance. It was first ‘discovered’ in 1935 by Doctors Stein and Leventhal, so for many years it was known as the Stein-Leventhal syndrome.

The term polycystic ovaries describes ovaries that contain many small 'cysts' (about twice as many as in normal ovaries), usually no bigger than 8 millimetres each, located just below the surface of the ovaries. The ‘cysts’ in polycystic ovaries are not true cysts. They are not full of liquid, they do not get bigger or burst, they do not require surgical removal and do not lead to ovarian cancer. They are actually follicles that have not matured to be ovulated (see image opposite), which is why the name of the condition is confusing.

It was originally thought that these follicular cysts caused the condition but we now know they are one of the symptoms and not everyone will get them. Due to the confusion with the name of the condition, both with healthcare professionals and the general public, there are now discussions around the potential for changing the name. This is an international process in which Verity is playing an integral role in the consultation and discussion surrounding any changes.

Polycystic ovaries (PCO) are very common, affecting around 1 in 5 (20%) women and AFAB individuals. Polycystic ovary syndrome (PCOS) is also very common, affecting 1 in 10 (10%) women and AFAB individuals, although this can vary from country to country.

Polycystic ovary syndrome (PCOS):
  • affects millions of women and AFAB individuals in the UK and worldwide
  • runs in families
  • is one of the leading causes of fertility problems in women
  • if not properly managed, can lead to additional health problems in later life
  • can have an impact on appearance and self-esteem


Although PCOS is treatable and the symptoms can be managed, it cannot be cured.
Diagram outlining egg development in the ovary. Primorodial folicle, primary folicles, secondary (vesticular) follicle, rupture follicle, corpus luteum and corpus albicans.
Ovum development
Diagram showing the structure of an ovum.
Structure of an ovum

Learn more

  • PCOS symptoms
  • Cause of PCOS
  • Long term health risks
  • Diagnosing PCOS
  • Treating the condition

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