How to distinguish if the arrival of Aunt Flo is due to the shedding of the endometrium or blood clots

Patient's question:

No

Doctor's answer:

Menstruation is caused by the shedding of the endometrium, so the clots you see are the pieces of endometrium that have shed. The presence of blood clots in the menstrual flow is related to the amount and speed of bleeding. If you bleed heavily, it may not have time to clot, resulting in the formation of a blood clot that is expelled. Often, the presence of blood clots may indicate that the bleeding volume is relatively high, leading to the formation of a larger clot.