Polycystic ovary syndrome – NHS

Polycystic ovary syndrome (PCOS) is a common condition that affects how a woman's ovaries work.

The3 main features of PCOS are:

If you have at least 2 of these features, you may be diagnosed with PCOS.

Polycystic ovariescontain a large number of harmless follicles that are up to 8mm (approximately 0.3in) in size.

The follicles are underdevelopedsacs inwhich eggs develop. In PCOS, thesesacs are often unable to release an egg, which means ovulation does not take place.

It's difficult to know exactly how many women have PCOS, but it's thought to be very common, affecting about 1 in every 5 women in the UK.

More than half of these women do not have any symptoms.

If you have signs and symptoms of PCOS, they'llusually become apparent during your late teens or early 20s.

They can include:

PCOS is also associated with an increased risk of developing health problems in later life, such as type 2 diabetes andhigh cholesterol levels.

The exact cause of PCOS is unknown, but itoften runs in families.

It's related to abnormal hormone levels in the body, including high levels of insulin.

Insulin is a hormone that controls sugar levels in the body.

Many women with PCOS are resistant to the action of insulin in their body and produce higher levels of insulin to overcome this.

This contributes to the increased production and activity of hormones like testosterone.

Being overweight orobese also increases the amount of insulin your body produces.

There's no cure for PCOS, but the symptoms can be treated. Speak to a GP if you think you may have the condition.

If you have PCOS and you're overweight,losing weight andeating a healthy, balanceddiet can make some symptoms better.

Medications are also available to treat symptoms such as excessive hair growth, irregular periods and fertility problems.

If fertility medications are not effective, a simple surgical procedure calledlaparoscopic ovarian drilling (LOD) may be recommended.

This involves using heat or a laser to destroy the tissue in the ovaries that's producing androgens, such as testosterone.

With treatment, most women with PCOS are able to get pregnant.

Page last reviewed: 1 February 2019Next review due: 1 February 2022

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Polycystic ovary syndrome - NHS

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