Uterine polyps are small tissue growths on the inside of the womb (also called the uterus). Since these growths come from the endometrium — the lining of the womb — they are also called endometrial polyps. Uterine polyps can vary enormously in size: some are as small as a sesame seed, while others are as large as a golf ball.
https://flo.health/menstrual-cycle/menopause/symptoms/uterine-polyps-causes

