The process of shedding involves the breaking down of the endometrium, and the loss of the tissue and blood which had constituted it through the vagina, over a series of days, accompanied by contractions of the uterus, often somewhat painful, to help expel material.
The process of shedding involves the breaking down of the lining, tearing small connective blood vessels, and the loss of the tissue and blood which had constituted it through the vagina, over a series of days. This is usually accompanied by contractions of the uterus, often somewhat painful, to help expel material.