Fibroids are noncancerous growths or tumours on the muscular part of the uterus (womb); sometimes they are also called myomas. Fibroids may be very small (about 5mm) or can grow to be quite large (10-15cm). They can be single or multiple, located on the surface of the uterus or inside it. Many women with fibroids do not notice any symptoms and will not need treatment, whereas others may experience problems such as painful and heavy periods, pressure symptoms and infertility. Treatment includes medication to shrink the fibroids and, in some women, surgical removal.