Uterine fibroids are tumours which grow from cells forming the muscle of the uterus. They are also called leiomyoma, myoma, fibromyoma, leiofibromyoma or fibroleiomyoma of the uterus and they can grow on the uterine wall and push out into the bladder, bowel or intestine or can grow within the uterine wall, or even project from the wall of the uterus on a narrow stalk into the uterine cavity. They can be as small as a pea and may go unnoticed but they can cause problems if they grow big.