Fibroids are due to some malfunction of the uterine cells,so they form tumours (abnormal growths) which are not cancerous; the tumour is made up of muscles and fibrous tissue. The exact cause of fibroids is unknown, but they are associated with the female sex hormones, oestrogen; that is why fibroids develop at the time of a woman’s productive ; at the age of 15-50 years. The severity of the symptoms vary , some women may never experience heavy cramps during periods , or frequent urination, and hence may not be aware if they have fibroids. Not all women have fibroids. In case you do experience some of the symptoms I have mentioned, it is important to see a doctor, who will diagnose and tell you what to do.