Symptoms of polycystic ovary syndrome 

The symptoms of polycystic ovary syndrome (PCOS) usually become apparent in your late teens or early twenties.

Not all women with PCOS have all of the symptoms. Each symptom can vary from mild to severe. In many women, the only symptoms are menstrual problems or a failure to conceive.

Common symptoms of PCOS include:

  • irregular periods or no periods at all
  • difficulty getting pregnant (because of irregular ovulation or failure to ovulate)
  • excessive hair growth (hirsutism) - usually on the face, chest, back or buttocks
  • weight gain
  • thinning hair and hair loss from the head 
  • oily skin or acne

You should talk to your GP if you have any of these symptoms and suspect you may have PCOS.

Fertility problems

Polycystic ovary syndrome is one of the most common causes of female infertility. Many women discover they have PCOS when they're trying to get pregnant and are unsuccessful.

During each menstrual cycle the ovaries release an egg (ovum) into the uterus. This process is called ovulation and usually occurs once a month. Women with PCOS often fail to ovulate or ovulate infrequently, which means they have irregular or absent periods and find it difficult to get pregnant.

Risks in later life

Having PCOS can increase your chances of developing other health problems later in life. For example, women with PCOS are at an increased risk of developing:

Women who have had absent or very irregular periods (fewer than three or four periods a year) for many years have a higher-than-average risk of developing cancer of the womb lining (endometrial cancer).

However, the chance of getting endometrial cancer is still small and can be minimised using treatments to regulate periods, such as the contraceptive pill or an intrauterine system (IUS).

Menstrual cycle: animation

This animation explains in detail how the menstrual cycle works.

Media last reviewed: 21/02/2013

Next review due: 21/02/2015

Page last reviewed: 03/07/2013

Next review due: 03/07/2015