What does the color of period blood mean? What’s normal and what’s not

The color of period blood can vary from bright red to dark brown or even black, and these changes are usually a natural part ...
The Conversation

Menstrual blood is being used to research a range of health conditions — from endometriosis to diabetes and cancer

Menstrual blood contains immune cells, stems cells and endometrial cells. ADragan/ Shutterstock Menstrual blood has historically been overlooked in research – considered only to be a waste product.