Fibroids are non-cancerous growths that develop in or around the womb (uterus). The growths are made up of muscle and fibrous tissue and vary in size.
They’re sometimes known as uterine myomas or leiomyomas. Many women are unaware they have fibroids because they don’t have any symptoms.
The exact cause of fibroids is unknown, but they’ve been linked to the hormone oestrogen.